Helvetica Chimica Acta p. 2363 - 2380 (1994)
Update date:2022-08-03
Topics:
Oppolzer
Moretti
Zhou
Alkylation of the chiral glycine derivative 2 with 'activated' organohalides under ultrasound-assisted phase-transfer catalysis or with activated and nonactivatcd organohalides in anhydrous medium provides (mostly crystalline) alkylation products 3. Acidic hydrolysis of the pure products 3 gives (aminoacyl)sultams 4 which by mild saponification furnish pure α-amino acids 5 in good overall yields from 2, along with recovered auxiliary 1 (Scheme 1). Pure ω-protected α,ω-diamino acids and α-amino-ω-(hydroxyamino)acids 12-16 are readily accessible from (ω-haloacyl)sultams 3 via reaction with N-nucleophiles followed by acidic and basic hydrolyses (Scheme 2). A reliable determination of the enantiomeric purity of α-amino acids using HPLC analysis of their N-(3,5-dinitrobenzoyl)prolyl derivatives 17 is presented.
View MoreHunan Shineway Enterprise Co., Ltd.
Contact:+86-731-86303875
Address:118, Huanghua International Airport Road, Huanghua Town, Changsha, Hunan 410137, China
zhengzhou Triz Pharma-Tech Co., Ltd
website:http://www.Trizpharma-tech.com
Contact:+86-0371-86597269,53392065
Address:High-tech Industrial Development Zone, Zhengzhou City, NO.7 Holly Street
SHUNYUANSHENG BIO-PHARMTECH CO., LTD
website:https://www.whsysbio.com
Contact:--
Address:Building 13, Liandong U Valley-Wuhan Economic Innovation Valley, No. 259, Xingsan Road, Shamao Street, Hannan District, Wuhan City, Hubei Province
Zhejiang Golden-Shell Pharmaceutical Co.,Ltd.
Contact:+86-576-87501888 / 87501988
Address:No.89 Zhongxing Road. Li'ao, Yuhuan, Zhejiang, China
Shanghai shibo Chemical Co., Ltd
Contact:+86-021-60753516
Address:688 Qiushi Road, Jinshan High-tech Park, Shanghai, China,201512
Doi:10.1021/ol501287x
(2014)Doi:10.1039/c4cc02706j
(2014)Doi:10.1021/jm501449u
(2015)Doi:10.1016/j.ejmech.2014.05.012
(2014)Doi:10.3987/COM-08-S(N)105
(2008)Doi:10.1002/zaac.201300646
(2014)