Continuous multistep synthesis of 2-(azidomethyl)oxazoles
作者:Thaís A Rossa、Nícolas S Suveges、Marcus M Sá、David Cantillo、C Oliver Kappe
DOI:10.3762/bjoc.14.36
日期:——
An efficient three-step protocol was developed to produce 2-(azidomethyl)oxazoles from vinyl azides in a continuous-flow process. The general synthetic strategy involves a thermolysis of vinyl azides to generate azirines, which react with bromoacetyl bromide to provide 2-(bromomethyl)oxazoles. The latter compounds are versatile building blocks for nucleophilic displacement reactions as demonstrated
One-Pot Synthesis of Multifunctionalized 1-Pyrrolines from 2-Alkyl-2<i>H</i>-azirines and Diazocarbonyl Compounds
作者:Ilya P. Filippov、Mikhail S. Novikov、Alexander F. Khlebnikov、Nikolai V. Rostovskii
DOI:10.1021/acs.joc.2c00977
日期:2022.7.1
the synthesis of 1-pyrrolines based on formal [4 + 1] annulation of 2-alkyl-2H-azirines with diazocarbonyl compounds has been developed. This one-pot approach includes the Rh(II)-catalyzed formation of 4-alkyl-2-azabuta-1,3-dienes, followed by the DBU-promoted cyclization, and features a good substrate tolerance. The 1-pyrrolines containing an ester group at the C3 were prepared in a three-step one-pot