N-Chlorosuccinimide/1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU)–Mediated Synthesis of 2,5-Disubstituted 1,3,4-Oxadiazoles
作者:Santosh P. Pardeshi、Sachin S. Patil、Vivek D. Bobade
DOI:10.1080/00397910903134592
日期:2010.5.11
N-chlorosuccinimide and 1,8-diazabicyclo[5.4.0]undec-7-ene oxidatively cyclizes structurally diverse acyl hydrazone, thereby providing an efficient and convenient method for the synthesis of various 2,5-disubstituted1,3,4-oxadiazoles. The salient features of this method are mild reaction conditions, short reaction time, excellent yields, and simple workup procedure.
(M)-Helicene-derived 2,2′-bipyridine N-monoxide catalyzed the allenylation of N-acylhydrazones with propargyltrichlorosilane with excellent regioselectivity and moderate-to-good enantioselectivity. This study represents the first catalytic asymmetricallenylation of acylhydrazones.
( M )-螺旋烯衍生的 2,2'-联吡啶N-一氧化物催化N-酰基腙与炔丙基三氯硅烷的联烯基化,具有优异的区域选择性和中等到良好的对映选择性。这项研究代表了酰腙的首次催化不对称联烯基化。