Preparation of N–H azirdines in high enantiomeric excess by in situ aziridine–azirine–aziridine interconversion
摘要:
Aziridine 6 is produced highly diastereoselectively by treatment of enantiopure 3-acetoxyaminoquinazolinone 4 (Q*NHOAc) with beta-trimethylsilylstyrene: desilylative elimination of Q* and in situ addition of cyanide to the intermediate azirine gives the NH-aziridine 8 of 83% ee.
Silver-promoted regio- and stereoselective aminocyanation of alkynes for the synthesis of β-aminoacrylonitriles using N-isocyanoiminotriphenylphosphorane
作者:Lingnan Chen、Shanshan Cao、Jingping Zhang、Zikun Wang
DOI:10.1016/j.tetlet.2019.05.045
日期:2019.6
The silver-promoted intermolecular aminocyanation of alkynes for the synthesis of (Z)-β-aminoacrylonitriles is reported, using N-isocyanoiminotriphenylphosphorane (NIITP) as both the nitrile and amine source. The transformation proceeds in moderate to good yields, and in a regio- and stereoselective manner, using a wide range of acetylenes.
1-(N-Acyl-carbamoyl)-2-cyanoaziridines of the formula ##STR1## wherein X is oxygen or sulphur, Z is hydrogen or an organic radical, and Y is a carbonyl, sulphonyl, sulphinyl, sulphenyl, phosphoryl or phosphonyl radical, and salts thereof, exhibit immune-stimulating and cancerostatic activities.