Cleavage of C(aryl)−CH
<sub>3</sub>
Bonds in the Absence of Directing Groups under Transition Metal Free Conditions
作者:Peng‐Fei Dai、Xiao‐Shan Ning、Hua Wang、Xian‐Chao Cui、Jie Liu、Jian‐Ping Qu、Yan‐Biao Kang
DOI:10.1002/anie.201901783
日期:2019.4.8
carbon–carbon σ‐bonds, especially for unreactive hydrocarbons, remain limited. Activation by ring strain, directing groups, or in the presence of a carbonyl or a cyano group is usually required. In this work, by using a sequential strategy site‐selective cleavage and borylation of C(aryl)−CH3 bonds has been developed under directing group free and transitionmetalfree conditions. Methyl groups of various arenes
emergence of pesticide resistance and ecological environment problems, the research and development of new alternatives for crop protection is highly desirable. In order to discover potent natural product-based insecticide candidates, a series of new cholesterol ester derivatives containing cinnamic acid-like fragments at the C-7 position were synthesized. Some derivatives showed potent pesticidal activities
Wiegand, Zeitschrift fur Naturforschung, 1949, vol. 4b, p. 249
作者:Wiegand
DOI:——
日期:——
Atabekyan,V.G. et al., Journal of Organic Chemistry USSR (English Translation), 1976, vol. 12, p. 1234 - 1236
作者:Atabekyan,V.G. et al.
DOI:——
日期:——
POLYMERIZABLE LIQUID CRYSTAL COMPOSITION AND OPTICALLY ANISOTROPIC BODY
申请人:JNC CORPORATION
公开号:US20160289562A1
公开(公告)日:2016-10-06
A polymerizable liquid crystal composition contains a polymerizable liquid crystal compound having good solubility, and is well-aligned without dissolving a substrate or a base material when coated onto the substrate. Moreover, the polymerizable liquid crystal composition causes no coating film unevenness during coating so that a smooth optically anisotropic body can be obtained. The polymerizable liquid crystal composition contains at least one kind of polymerizable liquid crystal compound having one or more polymerizable functional groups in one molecule, and a solvent, wherein the solvent includes a diacetate solvent and a ketone solvent.