Home > Organosulfur Compounds> (2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-sulfanylpropanoic acid

(2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-sulfanylpropanoic acid

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Origin: China

Cas No: 20887-95-0

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 50 mt/month

Lead time: 7 days for OEM, 3 days for ready goods

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Products Specification
Product Description

Quick Details
CAS No.:
20887-95-0
Other Names:
N-Boc-L-cysteine
MF:
C8H15NO4S
EINECS No.:
N/A
Place of Origin:
Shandong, China
Type:
Pharmaceutical Intermediates
Purity:
99.0% min
Brand Name:
Haihang
Model Number:
HHYJ-071301
Application:
Pharmaceutical Intermediates
Appearance:
White powder
Product name:
BOC-CYS-OH
Specific rotation:
+39.5 to +41.5°
State of solution(transmittance):
Clear 98.0% min.
Chloride[cl]:
0.020% max.
Ammonium [NH4]:
0.02% max.
Sulfate[SO4]:
0.020% max
Iron[Fe]:
10ppm max
Heavy metals [Pb]:
10ppm max
Arsenic[As2O3]:
1ppm max
Other amino acids:
Chromatographically not detectable
Packaging&Delivery
Packaging Details
1 kg/bag or 25 kg/drum
Port
Shanghai port or Qingdao port

Property

CAS No.: 20887-95-0 Formula: C8H15NO4S Molecular Weight: 221.27400

Description

Boc-L-cysteine is the protected form of L-Cysteine, a non-essential α-amino acid that is biosynthesized in humans. L-Cysteine is also a bicarbonate-sensitive endogenous excitotoxin in rats and possibly humans.

Basic Info

Chemical Name	(2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-sulfanylpropanoic acid
Synonyms	boc-L-cysteine; N-tert-butoxycarbonyl-L-cysteine; N-tert-Butyloxycarbonylcysteine; BOC-L-CYS-OH; N-Boc-L-Cys-OH; N-Boc-L-Cysteine; N-Boc-Cys-OMe; Boc-Cys-OH; N-(tert-Butyloxycarbonyl)-L-cysteine; N-Boc-L-cystein;
CAS No.	20887-95-0
Molecular Formula	C8H15NO4S
Molecular Weight	221.27400
PSA	114.43000
LogP	1.28500

Properties

Appearance & Physical State	light yellow liquid
Density	1.215 g/cm3
Boiling Point	361.4ºC at 760 mmHg
Melting Point	72-79ºC
Flash Point	172.3ºC
Refractive Index	1.503
Storage Condition	-20ºC
Vapor Pressure	3.34E-06mmHg at 25°C

Safety Info

HS Code	2930909090
WGK Germany	3

Synthesis Route

(2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-[(3-nitropyridin-2-yl)disulfanyl]propanoic acid→3-nitro-1H-pyridine-2-thione+(2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-sulfanylpropanoic acid
(BOC-CYS-OH)2→(2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-sulfanylpropanoic acid
L-Cysteine+tert-butoxycarbonyl anhydride→(2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-sulfanylpropanoic acid

Precursor

Boc-S-(4-Methylbenzyl)-L-Cysteine
tert-butoxycarbonyl anhydride
(BOC-CYS-OH)2
Boc-S-Benzyl-L-cysteine

Downstream Product

(2R)-2-amino-3-(benzylcarbamothioylsulfanyl)propanoic acid
2-[(3R)-3-[(2-methylpropan-2-yl)oxycarbonylamino]-4-oxo-2,3-dihydro-1,5-benzothiazepin-5-yl]acetic acid
(BOC-CYS-OH)2
felinine

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