Synthesis of aS-(Carboxymethyl)cysteine Analog of (L-2-Amino-6-adipyl)-L-cysteinyl-D-valine and its Cell Free Biosynthetic Conversion into 6-[2-(D-2-Amino-2-carboxyethyl)thio) acetamido]penicillanic Acid
作者:James E. Shields、Charles S. Campbell、Dale C. Duckworth、Norbert Neuss、Steven W. Queener
DOI:10.1002/hlca.19840670328
日期:1984.5.2
A new tripeptide (dimer), bis[(L-cysteine-S-acetyl)-L-hemicystinyl(S2 S2)-D-valine] (6) was synthesized by coupling N-(tert-butoxycarbonyl)-S-carboxymethyl-L-cysteine benzyl ester (1) with S-trityl-L-cysteinyl-D-valine benzyl ester and subsequent removal of the protecting groups. After reduction of the disulfide, the free tripeptide Cys (CH2CO-Cys-D-Val) (Ib) was used as a substrate of isopenicillin-N
通过偶联N-(叔丁氧羰基)-S-合成了一种新的三肽(二聚体)双[(L-半胱氨酸-S-乙酰基)-L-半胱氨酰(S 2 S 2)-D-缬氨酸](6)。羧甲基-L-半胱氨酸苄酯(1)与S-三苯甲基-L-半胱氨酰基-D-缬氨酸苄酯,随后除去保护基。二硫化物还原后,将游离的三肽Cys(CH 2 CO-Cys-D-Val)(Ib)用作异青霉素-N合成酶的底物,将其无细胞转化为6- [2-((D- 2-氨基-2-羧乙基)硫)乙酰胺基]青霉酸(IIa)。