Polypeptides. Part V. The use of t-butyl 2,4,5-trichlorophenyl carbonate in the synthesis of N-t-butoxycarbonyl amino-acids and their 2,4,5-trichlorophenyl esters
作者:Wallace Broadbent、J. S. Morley、B. E. Stone
DOI:10.1039/j39670002632
日期:——
t-Butyl2,4,5-trichlorophenylcarbonate, conveniently prepared from phosgene in two stages, reacts cleanly with amino-acids in the presence of bases to give N-t-butoxycarbonylamino-acids (and 2,4,5-trichlorophenol) in excellent yield. By co-extraction of the N-t-butoxycarbonylamino-acid and 2,4,5-trichlorophenol from the acidified reaction mixture, followed by treatment of the extracts with NN′-
2-(Aminomethyl)phenols, a new class of saluretic agents. 4. Effects of oxygen and/or nitrogen substitution
作者:G. E. Stokker、A. A. Deana、S. J. DeSolms、E. M. Schultz、R. L. Smith、E. J. Cragoe、J. E. Baer、H. F. Russo、L. S. Watson
DOI:10.1021/jm00348a024
日期:1982.6
series of oxygen and/or nitrogen substituted2-(aminomethyl)phenols was synthesized and tested orally in rats for saluretic and diuretic effects. Intravenous dog data are included as supplementary material to demonstrate diuretic responses, or lack thereof, in a second species. In general, substitution on nitrogen with groups other than lower alkyl or substitution on nitrogen and/or oxygen with groups
Substituted 2-aminomethylphenyl sulfamates and pharmaceutically acceptable acid addition salts wherein the sulfamate group is N-substituted with up to 2 groups and the phenyl nucleus is further substituted by from 2 to 4 nuclear substituents which are useful as diuretics and saluretics are disclosed. The products may be prepared by reacting a N-protected substituted 2-aminomethylphenol with a substituted sulfamoyl chloride to generate an intermediate which is N-deblocked to give the compounds of this invention.
Cephalosporins with a .alpha.-amino-(ureidophenyl)acetamido substituent at position 7 are prepared by acylation of a 7-aminocephalosporin with a derivative of .alpha.-amino-p(or m)-ureidophenylacetic acid. These compounds are antibacterial agents.
Processes for the Preparation of Tezacaftor and Intermediates Thereof
申请人:Apotex Inc.
公开号:US20200223832A1
公开(公告)日:2020-07-16
The present invention provides processes for the preparation of Tezacaftor, as well as intermediates useful in the preparation thereof. In particular, processes are provided for the preparation of a compound of Formula (3), and its conversion to Tezacaftor (1).