L'homologation d'alkyl-2 dioxaborinannes-1,3,2(I) en衍生α-甲氧基烷基-2 (II) est realisee par反应avec LiCH(OCH 3 )SC 6 H 5 suvie d'un traitement par HgCl 2 . Les intermediaires (II) sont oxydees par H 2 O 2 en tampon phosphate pour donner les aldehydes 通讯员。Les groupesalkales de (I) sont 介绍了par borhydration
Organoboranes. 35. Reaction of alkylthioboronic esters with trichloromethyllithium: preparation of one-carbon-extended carboxylic acids and thioacetals from alkenes via hydroboration
Ligand-Controlled Direct Hydroformylation of Trisubstituted Olefins
作者:Taeil Shin、Hyungsoo Kim、Sungmin Kim、Ansoo Lee、Min-Seob Seo、Jonghoon Choi、Hyungjun Kim、Hyunwoo Kim
DOI:10.1021/acs.orglett.9b01639
日期:2019.8.2
The direct hydroformylation of trisubstituted olefins has been achieved with a combination of a Rh(I) catalyst and a π-acceptor phosphorus (briphos) ligand. A sterically bulky briphos ligand with a large cone angle that forms a 1:1 complex with Rh(I) is found to be reactive for the hydroformylation of trisubstituted olefins. The aldehyde products were obtained with high diastereoselectivity (>99:1)
THE REACTION OF TRIALKYLBORANES WITH THE (α-LITHIO DERIVATIVES OF BIS(PHENYLTHIO)METHANE AND OF 1,1-BIS(PHENYLTHIO)PENTANE. A CONVENIENT METHOD FOR THE PREPARATION OF ALDEHYDES AND KETONES
作者:Shoji Yamamoto、Manzo Shiono、Teruaki Mukaiyama
DOI:10.1246/cl.1973.961
日期:1973.9.5
It was found that various aldehydes and ketones were readily prepared in good yields by the reactions of α-lithio derivatives of thioacetals with trialkylboranes.
Method of making a branched polymer, a branched polymer and uses of such a polymer
申请人:SYNTHOMER (UK) LIMITED
公开号:US10711073B2
公开(公告)日:2020-07-14
A method of making a branched polymer comprising (C═C)—(C═C)—CO groups is provided. The method comprises: (i) Providing, in admixture, at least one monofunctional monomer comprising one polymerisable carbon-carbon double bond per monomer, at least one multifunctional monomer comprising at least two polymerisable carbon-carbon double bonds per monomer, at least one chain transfer agent comprising a carbonyl group; (ii) Forming a polymer from the mixture; and (iii) Hydrolysing the polymer. A branched polymer is further provided.