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Protected Amino Acids & Peptide Intermediates

Structured protected amino-acid and peptide-intermediate portfolio covering FMOC, CBZ, BOC, N-acetyl, ester, MOC, amino alcohol and specialty intermediate families for synthesis and route-development programs.

Protected Amino Acids & Peptide Intermediates

Structured protected amino-acid and peptide-intermediate portfolio covering FMOC, CBZ, BOC, N-acetyl, ester, MOC, amino alcohol and specialty intermediate families for synthesis and route-development programs.

232 offerings

Protected Building Blocks

Broad coverage of protected amino-acid derivatives for controlled peptide synthesis and pharma intermediate workflows.

Clear Sub-Categories

FMOC, CBZ, BOC, N-acetyl, methyl ester, ethyl ester, isopropyl ester, MOC and specialty intermediate families are separated for easier customer discussions.

Selection Parameters

Identity, assay, chiral purity, impurity profile, residual solvents, water, storage and pack configuration are aligned to the intended synthesis route.

49 FMOC Protected Amino Acid Derivatives
40 CBZ Protected Amino Acid Derivatives
64 BOC Protected Amino Acid Derivatives
18 N-Acetyl Amino Acid Derivatives
18 Amino Acid Methyl Esters
11 Amino Acid Ethyl Esters
4 Amino Acid Isopropyl Esters
5 MOC Protected Amino Acid Derivatives
23 Amino Alcohols & Specialty Intermediates

FMOC Protected Amino Acid Derivatives

FMOC building blocks, D- and L-series derivatives, side-chain protected structures, activated esters and specialty peptide-linker intermediates.

49 products
ProductCAS No.
Fmoc-Aib-OH94744-50-0
Fmoc-Beta Alanine35737-10-1
Fmoc-D-Alanine79990-15-1
Fmoc-D-Asp(OBzl)-OH150009-58-8
Fmoc-D-Aspartic acid136083-57-3
Fmoc-D-Leucine114360-54-2
Fmoc-D-Leucine14360-54-2
Fmoc-DL-Serine Methyl Ester851678-66-5
Fmoc-D-Phenylalanine86123-10-6
Fmoc-D-Proline101555-62-8
Fmoc-D-Serine116861-26-8
Fmoc-D-Tryptophan86123-11-7
Fmoc-D-Valine84624-17-9
Fmoc-Glu(OtBu)-OH71989-18-9
Fmoc-Glycine29022-11-5
Fmoc-Glycine Methyl Ester121616-32-8
Fmoc-Gly-Gly-OH35665-38-4
Fmoc-Ile-Aib-OH2171139-20-9
Fmoc-L-Alanine207291-76-7
Fmoc-L-Alanine35661-39-3
Fmoc-L-Asp(OBzl)-OH86060-84-6
Fmoc-L-Asparagine119062-05-4
Fmoc-L-Aspartic acid71989-14-5
Fmoc-L-Glu(OBzl)-OH123639-61-2
Fmoc-L-Glutamic Acid121343-82-6
Fmoc-L-Glutamine71989-20-3
Fmoc-L-Isoleucine71989-23-6
Fmoc-L-Leucine35661-60-0
Fmoc-L-Lys(Boc)-OH71989-26-9
Fmoc-L-Lysine HCl139262-23-0
Fmoc-L-Lys-OH105047-45-8
Fmoc-L-Methionine71989-28-1
Fmoc-L-Phenylalanine35661-40-6
Fmoc-L-Phenylglycine102410-65-1
Fmoc-L-Proline71989-31-6
Fmoc-L-Ser(OBzl)-OH83792-48-7
Fmoc-L-Serine73724-45-5
Fmoc-L-Thr(tBu)-OL189337-28-8
Fmoc-L-Tryptophan35737-15-6
Fmoc-L-Tryptophan Methyl Ester147960-24-5
Fmoc-L-Tyrosine71989-38-3
Fmoc-L-Valine68858-20-8
Fmoc-N-Hydroxysuccinimide Ester82911-69-1
Fmoc-Sarcosine77128-70-2
Fmoc-Ser(tBu)-OH71989-33-8
Fmoc-Thr(TBu)-OH71989-35-0
Fmoc-Trp(Boc)-OH143824-78-6
Fmoc-Val-Cit159858-21-6
Fmoc-Val-OSu130878-68-1

CBZ Protected Amino Acid Derivatives

Carbobenzyloxy-protected amino-acid derivatives for protected intermediate synthesis and route development.

40 products
ProductCAS No.
CBZ-L-Alanine1142-20-7
CBZ-L-Alanine Methyl ester56877-38-4
CBZ-L-Alanine Ethyl ester132623-06-4
CBZ-D-Alanine26607-51-2
CBZ-D-Alanine Methyl ester126330-92-5
CBZ-Beta Alanine2304-94-1
CBZ-L-Aspartic acid4779-31-1
CBZ-L-Asp(OBzl)-OH3479-47-8
CBZ-D-Aspartic acid78663-07-7
CBZ-D-Asp(OBzl)-OH51186-58-4
CBZ-L-Aspargine2304-96-3
CBZ-Glycine1138-80-3
CBZ-Glycine methyl ester1212-53-9
CBZ-Glycine ethyl ester1145-81-9
CBZ-L-Glutamic Acid1155-62-0
CBZ-L-Glutamic Acid dimethyl ester5672-83-3
CBZ-L-Glutamine2650-64-8
CBZ-L-Isoleucine3160-59-6
CBZ-L-Leucine2018-66-6
CBZ-L-Lysine2212-75-1
CBZ-L-Lys(BOC)-OH2389-45-9
CBZ-L-Methionine1152-62-1
CBZ-L-Phenylalanine1161-13-3
CBZ-D-Phenylalanine2448-45-5
CBZ-L-Proline1148-11-4
CBZ-D-Proline37784-17-1
CBZ-Sarcosine39608-31-6
CBZ-L-Serine1145-80-8
CBZ-D-Serine6081-61-4
CBZ-L-Threonine19728-63-3
CBZ-L-Threonine Methyl ester57224-63-2
CBZ-L-Threonine Ethyl ester28130-04-3
CBZ-L-Threonine-OTBDMS94820-26-5
CBZ-L-Threonine amide49705-98-8
CBZ-L-Tryptophan7432-21-5
CBZ-L-Tyrosine1164-16-5
CBZ-L-Valine1149-26-4
CBZ-L-Valine methyl ester24210-19-3
CBZ-D-Valine1685-33-2
CBZ-D-Valine methyl ester154674-67-6

BOC Protected Amino Acid Derivatives

BOC-protected amino acids, esters, side-chain protected derivatives and phenylglycine/phenylalanine intermediates.

64 products
ProductCAS No.
BOC-L-Alanine15761-38-3
BOC-D-Alanine7764-95-6
BOC-L-Alanine Methyl ester28875-17-4
BOC-L-Alanine Ethyl ester105261-92-5
BOC-L-Alanine Isopropyl ester39825-33-7
BOC-3-Iodo-L-Alanine methyl ester93267-04-0
BOC-Beta Alanine3303-84-2
BOC-L-Aspartic acid13726-67-5
BOC-L-Asp(OBzl)-OH7536-58-5
BOC-L-Aspargine7536-55-2
BOC-Glycine4530-20-5
BOC-Glycine methyl ester31954-27-5
BOC-Glycine ethyl ester14719-37-0
BOC-Glycine Isopropyl ester197579-95-6
BOC-Gly-Gly-OH31972-52-8
BOC-L-Glutamic Acid2419-94-5
BOC-L-Glutamic Acid dimethyl ester59279-60-6
BOC-L-Glutamine13726-85-7
BOC-L-Homo phenylalanine100564-78-1
BOC-L-Isoleucine13139-16-7
BOC-L-Leucine monohydrate200936-87-4
BOC-L-Lysine13734-28-6
BOC-L-Lys(BOC)-OH2483-46-7
BOC-L-Methionine sulfoxide34805-21-5
BOC-Nitro Arginine2188-18-3
BOC-L-Phenylglycine2900-27-8
BOC-L-Phenylglycinol117049-14-6
BOC-DL-Phenylglycine3601-66-9
BOC-D-Phenylglycine33125-05-2
BOC-D-Phenylglycinol102089-74-7
BOC-D-Phenylglycine methyl ester35909-92-3
BOC-L-Phenylalanine13734-34-4
BOC-L-Phenylalanine Methyl ester51987-73-6
BOC-L-Phenylalanine ethyl ester53588-99-1
BOC-L-Phenylalaninol66605-57-0
BOC-DL-Phenylalaninol145149-48-0
BOC-4-Nitro-L-Phenylalanine33305-77-0
BOC-L-Proline15761-39-4
BOC-D-Proline37784-17-1
BOC-L-Proline Methyl ester74844-91-0
BOC-L-Proline Ethyl ester37813-30-2
BOC-L-Pyroglutamic methyl ester108963-96-8
BOC-Sarcosine13734-36-6
BOC-L-Serine methyl ester2766-43-0
BOC-L-Serine Isopropyl ester955379-18-7
BOC-L-Ser(OBzl)-OH59524-02-6
BOC-D-Serine methyl ester95715-85-8
BOC-D-Ser(OBzl)-OH47173-80-8
BOC-L-Threonine2592-18-9
BOC-L-Threonine Methyl ester79479-07-5
BOC-Thr(OBzl)-OH15260-10-3
BOC-L-Tryptophan13139-14-5
BOC-D-Tryptophan5241-64-5
BOC-DL-TryptophanCAS not listed
BOC-L-Tyrosine3978-80-1
BOC-L-Tyrosine Methyl ester4326-36-7
BOC-L-Tyrosine ethyl ester72594-77-5
BOC-L-Tyr(OBzl)-OH2130-96-3
BOC-L-Valine13734-41-3
BOC-L-Valine methyl ester58561-04-9
BOC-L-Valine Ethyl ester849928-27-4
BOC-D-Valine22838-58-0
BOC-D-Valine methyl ester106391-85-9
BOC-D-Valine Ethyl ester70717-76-9

N-Acetyl Amino Acid Derivatives

N-acetylated amino-acid derivatives for specialty intermediate, nutrition-adjacent and synthesis applications.

18 products
ProductCAS No.
N-Acetyl-L-Alanine Methyl ester3619-02-1
N-Acetyl-L-Alanine Isopropyl ester97-69-8
N-Acetyl-Glycine543-24-8
N-Acetyl-L-Glutamic Acid1188-37-0
N-Acetyl-L-Glutamine2490-97-3
N-Acetyl-L-Phenylalanine2901-75-9
N-Acetyl-L-Phenylalanine Methyl ester3618-96-0
N-Acetyl-L-Phenylalanine ethyl ester2361-96-8
N-Acetyl-L-Proline68-95-1
N-Acetyl-D-Proline59785-68-1
N-Acetyl-L-Proline Methyl ester27460-51-1
N-Acetyl-L-Proline Ethyl ester125347-82-2
N-Acetyl-Sarcosine5888-91-5
N-Acetyl-L-Tryptophan1218-34-4
N-Acetyl-DL-Tryptophan87-32-1
N-Acetyl-L-Tyrosine537-55-3
N-Acetyl-L-Tyrosine Methyl ester2440-79-1
N-Acetyl-L-Tyrosine ethyl ester36546-50-6

Amino Acid Methyl Esters

Hydrochloride methyl ester derivatives for peptide synthesis, pharma intermediates and protected amino-acid chemistry.

18 products
ProductCAS No.
L-Alanine Methyl ester.HCl2491-20-5
D-Alanine Methyl ester.HCl14316-06-4
Glycine methyl ester.HCl5680-79-5
L-Glutamic Acid dimethyl ester.HCl23150-65-4
L-Phenylalanine Methyl ester.HCl7524-50-7
D-Phenylalanine Methyl ester.HCl13033-84-6
L-Proline Methyl ester.HCl2133-40-6
L-Tryptophan methyl ester.HCl7524-52-9
D-Tryptophan methyl ester.HCl14907-27-8
DL-Tryptophan methyl ester.HCl5619-09-0
Sarcosine methyl ester.HCl13515-93-0
L-Serine methyl ester.HCl5680-80-8
D-Serine methyl ester.HCl5874-57-7
L-Threonine Methyl ester.HCl39994-75-7
D-Phenylglycine methyl ester.HCl19883-41-1
L-Tyrosine Methyl ester.HCl3417-91-2
L-Valine methyl ester.HCl6306-52-1
D-Valine Ethyl ester.HCl73913-64-1

Amino Acid Ethyl Esters

Ethyl ester hydrochloride derivatives covering alanine, glycine, phenylalanine, serine, tyrosine and valine structures.

11 products
ProductCAS No.
L-Alanine Ethyl ester.HCl1115-59-9
D-Alanine Ethyl ester.HCl6331-09-5
Glycine ethyl ester.HCl623-33-6
L-Phenylalanine ethyl ester.HCl3182-93-2
D-Phenylalanine ethyl ester.HCl63060-94-6
Sarcosine ethyl ester.HCl52605-49-9
L-Serine Ethyl ester.HCl26348-61-8
D-Serine Ethyl ester.HCl104055-46-1
L-Tyrosine ethyl ester.HCl4089-07-0
D-Phenylglycine ethyl ester.HCl17609-48-2
L-Valine Ethyl ester.HCl17609-47-1

Amino Acid Isopropyl Esters

Selected isopropyl ester hydrochloride derivatives for targeted synthesis programs.

4 products
ProductCAS No.
L-Alanine Isopropyl ester.HCl62062-65-1
D-Alanine Isopropyl ester.HCl39613-92-8
Glycine Isopropyl ester.HCl14019-62-6
L-Serine Isopropyl ester.HCl37592-53-3

MOC Protected Amino Acid Derivatives

Methoxycarbonyl-protected amino-acid derivatives for specialty route and intermediate work.

5 products
ProductCAS No.
MOC-L-Isoleucine71989-23-6
MOC-L-Leucine162537-11-3
MOC-L-Phenylalanine95753-55-2
MOC-D-Phenylglycine50890-96-5
MOC-L-Valine74761-42-5

Amino Alcohols & Specialty Intermediates

Amino alcohols, amides, benzyl derivatives, nitro amino acids, uracil and specialty organic intermediates.

23 products
ProductCAS No.
L-Alaninol2749-11-3
L-Valinol2026-48-4
D-Phenylglycinol56613-80-0
L-Phenylalaninol3182-95-4
DL-Phenylalaninol16088-07-6
L-Threonine amide33209-01-7
L-Alanine amide102029-80-1
L-Prolinamide7531-52-4
L-Aspartic acid monosodium323194-76-9
Nitraso methyl urea684-93-5
4-Nitro-D-Phenylalanine56613-61-7
4-Nitro-L-Phenylalanine207591-86-4
4-Nitro-L-Arginine218-418-9
4-Nitro-L-Arginine methyl ester.HCl51298-62-5
4-Hydroxy-D-Phenylglycine methyl ester.HCl22818-40-2
5-Bromo Uracil51-20-7
5-Bromo-2,4-Dichlor Pyrimidine36082-50-5
L-Glutamic acid gamma-benzyl ester1676-73-9
N-epsilon-Trifluoroacetyl Lysine10009-20-8
O-Benzyl-L-Serine4726-96-9
O-Benzyl-DL-Serine5445-44-3
O-Benzyl-L-Tyrosine16652-64-5
18-Crown-617455-13-9

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