A novel organocatalyticformal [3 + 2] cycloaddition reaction with in situ generation of N-carbamoyl nitrones is presented. For the first time, N-Boc- and N-Cbz-protected isoxazolidines have been directly obtained as single diastereoisomers in generally high yields and enantiomeric excesses using mild reaction conditions and inexpensive, readily available Cinchona alkaloid quaternary ammonium salts
作者:Chenyang Wang、Phong Dam、Mohamed Elghobashy、Angelika Brückner、Jabor Rabeah、Luis Miguel Azofra、Osama El-Sepelgy
DOI:10.1021/acscatal.3c04305
日期:2023.11.3
Herein, we present a biomimetic method for the catalytic deammoniation of diverse primary amines, including amino acids, natural products, and pharmaceuticals. This innovative approach, characterized by its operational simplicity and high selectivity, provides a rapid and easily accessible pathway to a wide range of olefin products derived from nonfossil-based chemicals. The transformation relies on