申请人:The United States of America as represented by the Secretary of Agriculture
公开号:US07534917B1
公开(公告)日:2009-05-19
A method of producing dicarboxylic acids (e.g., α,ω dicarboxylic acids) by reacting a compound having a terminal COOH (e.g., unsaturated fatty acid such as oleic acid) and containing at least one carbon-carbon double bond with a second generation Grubbs catalyst in the absence of solvent to produce dicarboxylic acids. The method is conducted in an inert atmosphere (e.g., argon, nitrogen). The process also works well with mixed unsaturated fatty acids obtained from soybean, rapeseed, tall, and linseed oils.
Cross‐Si‐ing the Jordan: Cross‐coupling reactions of 2‐(2‐hydroxyprop‐2‐yl)phenyl‐substituted alkylsilanes with a variety of aryl halides proceed in the presence of palladium and copper catalysts. The use of K3PO4 base allows for highly chemoselective alkyl coupling with both primary and secondary alkyl groups (Alk).
乔丹的交叉反应:2-(2-羟基丙-2-基)苯基取代的烷基硅烷与各种芳基卤化物的交叉偶联反应在钯和铜催化剂的存在下进行。K 3 PO 4碱的使用允许与伯烷基和仲烷基(Alk)都高度化学选择性的烷基偶联。
INTERNAL OLEFIN SULFONATE COMPOSITION
申请人:KAO CORPORATION
公开号:US20150366775A1
公开(公告)日:2015-12-24
Provided are an internal olefin sulfonate composition which is capable of sufficiently enhancing foamability, light foam quality, and instantaneous foam dissipation property, and a cleansing composition containing the internal olefin sulfonate composition. The internal olefin sulfonate composition comprises (A) an internal olefin sulfonate having 12 carbon atoms and (B) an internal olefin sulfonate having 14 carbon atoms, wherein a content mass ratio of the component (A) to the component (B), (A/B), is from 10/90 to 90/10, and a total content of the component (A) and the component (B) in the internal olefin sulfonate is from 60 to 100% by mass.
modification of the Wittig reaction is the alpha-lithiation of the lithium bromide coordinated ylide-aldehyde adduct (the so-called "P-betaine"). Only phenyllithium effects this deprotonation rapidly and cleanly. Alkyllithiums (in particular, butyl-, sec-butyl-, and tert-butyllithium) react only sluggishly and incompletely, being tied up in very stable mixed aggregates with the lithium alkoxide part
Homoallylic substitution reactions of lithium dialkyl cuprates with cyclopropylcarbinyl halides: mechanistic considerations
作者:Robert T. Hrubiec、Michael B. Smith
DOI:10.1016/s0040-4020(01)91792-2
日期:1984.1
kanes, , react to give good yields of the homoallylic substitution product, . Less reactive organocuprates react with to give mixtures of and the direct substitution product, . These results are consistent with a copper(I) radical intermediate which undergoes facile rearrangement prior to reductive coupling.