Efficient Dehydration of Hydroxyenals and -enones: HfCl4 · (THF)2 as an effective Catalyst for Di-, Tri- and Tetraene Formation
作者:Susumu Saito、Takashi Nagahara、Hisashi Yamamoto
DOI:10.1055/s-2001-18094
日期:——
Polyenes were easily obtained from hydroxy(tri, di)ene-containing carbonyl compounds in good to excellent yields in the presence of catalytic HfCl4 · (THF)2.
Exclusive γ-regio functionalization of crotonaldehyde using γ-trimethylsilyl crotonaldimine. Application to the one pot synthesis of conjugated dienals
作者:Moncef Bellassoued、Malika Salemkour
DOI:10.1016/0040-4020(96)00165-2
日期:1996.3
Cesium fluoride mediated reaction of γ-trimethylsilyl N-tert-butyl crotonaldimine 9 with a wide range of aldehydes takes place in DMSO at room temperature and affords exclusiveγ-regiofunctionalized products. Heating (rt to 100°C) the δ-silyloxy imines 11 thus obtained leads, after very mild hydrolysis of the tert-butylimine function, to the conjugateddienals 14 in good yields and with excellent
Benzopyrane and benzothiopyrane derivatives useful as anti-mycotic agents
申请人:Sandoz Ltd.
公开号:US04382951A1
公开(公告)日:1983-05-10
Benzopyrane and benzothiopyrane derivatives which possess pharmaceutical in particular anti-mycotic activity.
苯并吡喃和苯并噻吩衍生物具有药用特性,特别是抗真菌活性。
Furber, Mark; Herbert, John M.; Taylor, Richard J. K., Journal of the Chemical Society. Perkin transactions I, 1989, p. 683 - 690
作者:Furber, Mark、Herbert, John M.、Taylor, Richard J. K.
DOI:——
日期:——
A new and easy route to (2E,4E)-dienals by four-carbon homologation of aldehydes
作者:Moncef Bellassoued、Malika Salemkour
DOI:10.1016/s0040-4039(00)73973-6
日期:1993.8
A new synthetic method of (2E,4E)-dienals by four-carbon homologation of aldehydes is described. gamma-trimethylsilyl crotonaldimine 2 , easily generated from N-ter-butyl-crotonaldimine 1, LDA and ClSiMe3, reacts with aldehydes in the presence of catalytic CsF in DMSO at rt --> 100-degrees-C to afford homologous aldehydes 3 in good yields and with excellent (E,E)-selectivities.