Titanacyclopentene complexes and their application as 1,4-dicarbanion equivalentsElectronic supplementary information (ESI) available: experimental details. See http://www.rsc.org/suppdata/cc/b3/b311572k/
作者:Andreas Goeke、Daniel Mertl、Stephanie Jork
DOI:10.1039/b311572k
日期:——
The treatment of Ti(OiPr)4 with 3-butenylmagnesium chloride generates titanacyclopentene complexes which effectively add to carbonyl compounds and nitriles to afford the 1,4-coupling products with high Z:E selectivities.
Palladium catalyzed reaction of acyltins with organichalides were investigated. Among the halides, acyl halides and allylic halides were good substrates, and the latter gave allylic ketones in good yields.
1-Trimethylsilyl 2-methylcyclopropane cis or trans resulting from the silylation of 1-bromo 1-propene is a convenient regio- and stereospecific precursor of β,γ-unsaturated Z or E ketones and 2-butene sulfonic acid.