Par transposition photochimique de trimethylsilyl-2 furanne a -78°C,形成 du trimethylsilyl-4 butadiene-2,3 al 催化部分氢化催化剂 (Pd/c) au trimethylsilyl-3 butanal。Le bis-(trimethylsilyl)-2,5 导管a la cetone et a l'aldehyde allenylique。La cetone导管 par chauffage en solution diluee benzenique a 150°C au bis (trimethysilyl)-2,4 furanne
o‐Carboryne (1,2‐dehydro‐o‐carborane) is a very useful synthon for the synthesis of a variety of carborane‐functionalized molecules. Diels‐Alder reaction of o‐carboryne with furans gave a series of carborane‐fused oxanorbornenes in moderate to high yields using 1‐OTf‐1,2‐C2B10H11 as carboryne precursor. The resultant cycloadducts can undergo hydrogenation, cyclic oxidation, bromination, [4 + 2]/[2
ø -Carboryne(1,2-脱氢ö -carborane)是用于多种碳硼烷官能化分子的合成一个非常有用的合成子。o - carboryne与呋喃的Diels-Alder反应使用1-OTf-1,2-C 2 B 10 H 11作为碳硼炔前体,以中等至高收率得到了一系列碳硼烷稠合的氧杂降冰片烯。生成的环加合物可以进行加氢,环氧化,溴化,[4 + 2] / [2 + 2]环加成和亲核开环反应,从而提供各种高度官能化的碳硼烷,这些化合物可能会在医学和材料科学中用作有用的基本单元。
Activation of C–H Bonds of Heterocyclic and Alicyclic Compounds Using Calcium Atoms
作者:Kunio Mochida、Kenji Kojima、Yasuhiro Yoshida
DOI:10.1246/bcsj.60.2255
日期:1987.6
Calciumatoms have been inserted into C–H bonds of heterocyclic (furans and thiophene) and alicyclic compounds (cyclohexanes and cyclopentane) to give the corresponding organocalcium hydrides. The organocalcium hydrides thus produced reacted with trimethylchlorosilane to give trimethylsilyl-substituted heterocyclic and alicyclic compounds, and a reduced product (trimethylsilane).
Catalytic Enantioselective Arylation of Glyoxylate with Arylsilanes: Practical Synthesis of Optically Active Mandelic Acid Derivatives
作者:Kohsuke Aikawa、Yūta Hioki、Koichi Mikami
DOI:10.1002/asia.201000522
日期:2010.11.2
a little does the trick! The catalytic enantioselective arylation using chiral dicationic palladium complexes provides a reliable and useful access to enantiomerically enriched mandelic‐acid derivatives. Significantly low catalyst loading (down to 0.002 mol %) as well as easy catalyst handling are the advantage of this practical method.
[EN] SILYLATION OF AROMATIC HETEROCYCLES BY DISILANES USING POTASSIUM ALKOXIDE CATALYSTS<br/>[FR] SILYLATION D'HÉTÉROCYCLES AROMATIQUES PAR DISILANES À L'AIDE DE CATALYSEURS D'ALCOXYDE DE POTASSIUM
申请人:CALIFORNIA INST OF TECHN
公开号:WO2016100606A1
公开(公告)日:2016-06-23
The present invention describes chemical systems and methods for silylating heteroaromatic organic substrates, said system consisting essentially of a mixture of (a) at least one organodisilane and (b) at least alkoxide base, preferably a potassium alkoxide base, and said methods comprising contacting a quantity of the organic substrate with a mixture consisting essentially of (a) at least one organodisilane and (b) at least one alkoxide base, preferably a potassium alkoxide, under conditions sufficient to silylate the heteroaromatic substrate.
organosilicon compounds, dibromoboranes, and the metal-free organocatalyst Me3SiNTf2. This Si/B exchange approach has been successfully applied to the synthesis of arylborane molecules 4a-c, oligomers 8a,b, and polymers 8a',b'. Photophysical investigations, supported by TD-DFT calculations, reveal highly effective π-conjugation in thienyl- and furylborane species; the latter are also highly emissive.