Knoevenagel type condensation of 4-unsubstituted isoxazolinones with ketones or aldehydes followed by Michael addition of a nucleophile — hydride, cyanide, or phosphite— and exposure of the adduct to sodium nitrite/aqueous acetic acid and ferrous sulfate gives variously functionalised alkynes.
3,4-Disubstituted lsoxazolin-5-ones by Sodium Borohydride Reduction of 4-Arylmethylene- and 4-Alkylideneisoxazol-5(4<i>H</i>)-ones
作者:Egle M. Beccalli、Tiziana Benincori、Alessandro Marchesini
DOI:10.1055/s-1988-27738
日期:——
Reduction of 4-arylmethylene- and 4-alkylidenisoxazol-5(4H)-ones with sodium borohydride affords the corresponding 3,4-disubstituted isoxazol-5(4H)-ones.
4-Alkylideneisoxazol-5-ones. Synthesis, tautomerism, and rearrangement to pyrroles
作者:Hans Joachim Wollweber、Curt Wentrup
DOI:10.1021/jo00212a007
日期:1985.6
Unusual Approach to Branched 3-Alkynylamides and to 1,5-Dihydropyrrol-2-ones
作者:Igor Dias-Jurberg、Fabien Gagosz、Samir Z. Zard
DOI:10.1021/ol902472r
日期:2010.2.5
Rare carboxamide branched alkynes such as 11a can be readily obtained by reaction of the electrophilic 4-alkylidene isoxazolinones with isocycanides followed by nitrosative cleavage of the heterocyclic ring. N-lodosuccinimide induced ring closure in the presence of a nucleophile results in the formation of new iodopyrrolinones such as 16c.
Harhash,A.H. et al., Indian Journal of Chemistry, 1973, vol. 11, p. 1 - 3