Selective difluoroalkylation of alkenes by using visible light photoredox catalysis
作者:Chunghyeon Yu、Naeem Iqbal、Sehyun Park、Eun Jin Cho
DOI:10.1039/c4cc05467a
日期:——
A visiblelight-induced process for selective difluoroalkylation of unactivated alkenes has been developed. The choice of base is crucial for governing the chemoselectivity of the process to produce difluoroalkylated alkanes and alkenes.
申请人:Industry-University Cooperation Foundation Hanyang University ERICA Campus 한양대학교 에리카산학협력단(120120008551) Corp. No ▼ 131471-0017977BRN ▼134-82-10205
公开号:KR20160040875A
公开(公告)日:2016-04-15
본 발명은 다이플루오로알킬기가 도입된 알케인(alkane) 및 알켄(alkene)을 선택적으로 제공할 수 있는 다이플루오로알킬기가 도입된 유기 화합물의 제조 방법에 관한 것이다. 일 구현예에 따르면, 상기 제조 방법은 광촉매, 알켄 화합물, 할로다이플루오로아세테이트, 베이스 및 용매를 포함하는 혼합물을 제조하되, 상기 베이스로 3차 아민 또는 비양성자성 음이온을 사용하고, 상기 혼합물에 가시광선을 조사하는 것을 포함한다.
Chiral Counteranions in Asymmetric Transition-Metal Catalysis: Highly Enantioselective Pd/Brønsted Acid-Catalyzed Direct α-Allylation of Aldehydes
作者:Santanu Mukherjee、Benjamin List
DOI:10.1021/ja074678r
日期:2007.9.1
Pd/chiral acid-catalyzed α-allylation of α-branched aldehydes with an allyl amine as the allylating species that creates all-carbonquaternary stereogenic centers in high yields and enantioselectivities. To our knowledge, this is the first time that a chiral anionic ligand is applied for achieving asymmetric induction in a palladium-catalyzedallylicalkylation reaction.
IBX works efficiently under solvent free conditions in ball milling
作者:Tapas Kumar Achar、Saikat Maiti、Prasenjit Mal
DOI:10.1039/c4ra00415a
日期:——
explosiveness at high temperature and poor solubility in common organic solvents except DMSO. Since the discovery of Dess–Martin Periodinane in 1983, several modified IBX systems have been reported. However, under ballmilling conditions, IBX works efficiently with various organic functionalities at ambient temperature under solvent free conditions. Also, the waste IBA (2-iodosobenzoic acid) produced