Method for the production of chiral 1,3-aminoalcohols
申请人:BioCatalytics, Inc.
公开号:US05916786A1
公开(公告)日:1999-06-29
The disclosure describes a method for the preparation of chiral 1,3-aminoalcohols in high optical purity. The method combines the stereoselective oxidation of a 1,4-diol to a gamma-lactone using an alcohol dehydrogenase, the conversion of the gamma-lactone to the corresponding 4-hydroxyamide, 4-hydroxyhydroxamic acid, or 4-hydroxyhydrazide, and stereospecific rearrangement of the 4-hydroxyamide, 4-hydroxyhydroxamic acid, or 4-hydroxyhydrazide to the corresponding chiral 1,3-aminoalcohol.
Precursors for the production of chiral 1,3-aminoalcohols
申请人:Biocatalytics, Inc.
公开号:US06207862B1
公开(公告)日:2001-03-27
The disclosure describes novel precursors for the preparation of chiral 1,3-aminoalcohols. The precursors are chiral 4-hydroxycarboxamides, 4-hydroxyhydroxamic acids, or 4-hydroxyhydrazides produced from chiral gamma-lactones, which in turn are derived from 1,4-diols by stereoselective oxidation. The chiral 4-hydroxycarboxamides, 4-hydroxyhydroxamic acids, or 4-hydroxyhydrazides are converted into chiral 1,3-aminoalcohols by stereospecific rearrangement.
Cu(<scp>ii</scp>)/SPDO complex catalyzed asymmetric Baeyer–Villiger oxidation of 2-arylcyclobutanones and its application for the total synthesis of eupomatilones 5 and 6
作者:Chang-Sheng Zhang、Ya-Ping Shao、Fu-Min Zhang、Xue Han、Xiao-Ming Zhang、Kun Zhang、Yong-Qiang Tu
DOI:10.1039/d2sc02079c
日期:——
3-disubstituted cyclobutanones of Baeyer–Villigeroxidation catalyzed by a Cu(II)/SPDO complex is reported for the first time, producing normal lactones in excellent enantioselectivities (up to 96% ee) and regioselectivities (up to >20/1), along with unreacted ketones in excellent enantioselectivities (up to 99% ee). The current transformation features a wide substrate scope. Moreover, catalytic asymmetric total