Lewis Acid promoted Oxidative
Rearrangement of Tertiary Allylic Alcohols with the PhIO/TEMPO
System
作者:Jean-Michel Vatèle
DOI:10.1055/s-2008-1078500
日期:——
catalyzed oxidativerearrangement of tertiary allylic alcohols to β-disubstituted enones by the TEMPO/PhIO system is described. Bismuth triflate was found to be the most efficient catalyst for the majority of the substrates tested except for tertiary vinyl carbinols which could be transformed to enals in fair yields only when Re 2 O 7 was used as catalyst. A plausible mechanism for this oxidative rearrangement
描述了一种温和且环境友好的方法,用于路易斯酸催化叔烯丙醇氧化重排为 TEMPO/PhIO 系统的 β-二取代烯酮。发现三氟甲磺酸铋是大多数测试底物的最有效催化剂,但叔乙烯基甲醇除外,只有当使用 Re 2 O 7 作为催化剂时,叔乙烯基甲醇才能以合理的产率转化为烯醛。讨论了这种氧化重排的合理机制。
NOVEL METHOD FOR PRODUCING 5, 5-DISUBSTITUTED-4, 5-DIHYDROISOXAZOLE
申请人:KUMIAI CHEMICAL INDUSTRY CO., LTD.
公开号:US20210047280A1
公开(公告)日:2021-02-18
The present invention addresses the problem of providing an industrially preferable, economical, and environmentally friendly method for producing the 4,5-dihydroisoxazole represented by a formula (3).
The present invention enables the compound of a formula (3) to be produced by reacting the compound of a formula (2) according to the reaction represented by a reaction formula in the presence of an acid catalyst.
Highly stereoselective synthesis of a sex pheromone of the dry bean beetleCallosobruchus analis
作者:O. A. Pinsker、P. G. Tsiklauri、N. Ya. Grigor'eva
DOI:10.1007/bf02495308
日期:1999.7
Total synthesis of 3-methylhept-2(Z)-enoic acid, a sexpheromone of the dry bean beetleCallosobruchus analis, has been performed using a previously developed highly stereoselective method of the construction of disubstituted (Z)-methylolefins based on the higher thermodynamic stability of (E)-isomers of α,β-disubstituted acroleins.
The invention provides compounds of Formula (I) and pharmaceutically acceptable salts thereof, wherein Ya, Yb, R1, R2, and G are as described in the specification, as well as compositions comprising a compound of formula (I). The compounds are useful as inhibitors of bacterial RNA polymerase and as antibacterial agents.