Substituent control over the regiochemistry of ring opening of 2-aziridinylmethyl radicals
作者:Adrian L. Schwan、Mitchell D. Refvik
DOI:10.1016/s0040-4039(00)74041-x
日期:1993.7
Several substituted 2-aziridinylmethyl radicals have been generated and a rapid ringopening ensues to produce aminyl radicals by way of CN bond cleavage and in some instance α-aminyl carbon radicals via CC bond homolysis.
Photoreactions of β-aziridinylacrylonitriles and acrylates with alkenes: formation of head-to-head adducts and application to the preparation of pyrrolizidine alkaloid
The photochemical C,C-bond cleavage of N-benzyl β-aziridinylacrylonitrile 1 and acrylate 2 and the subsequent [3+2] cycloaddition with electron-deficient alkenes afforded head-to-head adducts selectively and efficiently. Irradiation of N-phenyl aziridine 3 with acrylonitrile gave adducts, but photoreaction of N-benzoyl aziridine 4 and thermal reactions of 3 and 4 with alkenes yielded C(γ),N-cleaved