Catalytic C–H Arylation of Aliphatic Aldehydes Enabled by a Transient Ligand
作者:Ke Yang、Qun Li、Yongbing Liu、Guigen Li、Haibo Ge
DOI:10.1021/jacs.6b08478
日期:2016.10.5
The direct arylation of aliphaticaldehydes has been established via Pd-catalyzed sp3 C-H bond functionalization in the presence of 3-aminopropanoic acids as transient directing groups. The reaction showed excellent functional group compatibility and chemoselectivity in which a predominant preference for functionalizing unactivated β-C-H bonds of methyl groups over others was achieved. In addition
PROCESS FOR THE PRODUCTION OF 4-ALKANOYLOXY-2-METHYLBUTANOIC ACID
申请人:DSM IP ASSETS B.V.
公开号:US20150099894A1
公开(公告)日:2015-04-09
The present invention relates to an improved process for the production of 4-alkanoyloxy-2-methylbutanoic acid, as well as to the use of such compounds in organic syntheses, especially in processes forming intermediates (building blocks) for the synthesis of organic compounds comprising isoprene (isoterpene) units, such as β-carotene or other carotenoids (e.g. canthaxanthin, zeaxanthin or astaxanthin) or as vitamin E or vitamin A as well as other structurally similar compounds.