Abstractmagnified imageA general and efficient copper(I)‐catalyzed cross‐coupling and heterocyclization reaction of terminal alkynes and β‐iodo‐α,β‐unsaturated acid derivatives has been developed under very mild conditions. This method provides easy access from good to excellent yields of a variety of 5‐ylidenebutenolides and 3‐substituted isocoumarins with excellent regio‐ and stereoselectivity. This procedure does not require the use of any expensive supplementary additives, and is palladium‐free.
3,3-Disubstituted prop-2-enoic acids were selectively prepared in good yields under mild experimental conditions via palladium-catalysed cross-coupling of 3-substituted 3-iodobut-2-enoic acids with miscellaneous organometallic reagents using dichlorobis(acetonitrile)palladium(II) as catalyst and DMF as solvent.
3,3-Difluoro-1-iodocyclopropenes: A Simple Synthesis and Their Reactions
作者:Wei Xu、Qing-Yun Chen
DOI:10.1021/jo020431v
日期:2002.12.1
The [1 + 2] cycloaddition reaction of 1-iodoalkynes with difluorocarbene, generated from the decomposition of FSO2CF2COOSiMe3 in diglyme in the presence of 10 mol % NaF at 120 degreesC, gives 3, 3-difluoro-1-iodocyclopropenes in good yields. These new iodides can be trifluoromethylated and functionalized via the Heck reaction. The unusual hydrolytic reactions of the iodides under acidic conditions was also investigated.
COMPOSITIONS AND RELATED METHODS FOR AGRICULTURE
申请人:Flagship Pioneering Innovations V, Inc.
公开号:US20210289794A1
公开(公告)日:2021-09-23
The invention comprises methods for decreasing colonization by a bacterium of a gut of a stink bug, the method comprising providing a composition comprising vanillin or an analog thereof; and delivering said composition to an egg from which the stink bug will hatch, whereby colonization by the bacterium within the gut of the stink bug hatched from the egg treated with the composition is decreased relative to a stink bug hatched from an untreated egg. In some embodiments, the decrease in colonization by the bacterium decreases the fitness of the stink bug, e.g., decreases reproductive ability, survival, rate of development, number of eggs, number of hatched eggs, adult emergence rate, body length, body width, body mass, or cuticle thickness. In some embodiments of the methods herein, the bacterial colonization-disrupting agent is an inhibitor of bacterial metabolism. In some embodiments, the bacterial colonization-disrupting agent is a polyhydroxyalkanoate (PHA) synthesis inhibitor.