Diastereoselective ring-closing metathesis for the construction of a quaternary carbon stereogenic center
摘要:
A diastereoselective ring-closing metathesis of the trienes I leading to the Formation of a quaternary carbon stereogenic center on the cyclohexenes 2 has been developed. (C) 2002 Elsevier Science Ltd. All rights reserved.
Diastereoselective ring-closing metathesis for the construction of a quaternary carbon stereogenic center
摘要:
A diastereoselective ring-closing metathesis of the trienes I leading to the Formation of a quaternary carbon stereogenic center on the cyclohexenes 2 has been developed. (C) 2002 Elsevier Science Ltd. All rights reserved.
geminal divinyl compounds from ketones was developed. An allyl titanium reagent prepared from 1-phenylthio-4-trimethylsilyl-2-butene was reacted with a ketone, and the resulting tertiary alcohol was subjected to a Brønsted acid-mediated rearrangement reaction to generate a geminal divinyl compound. Introduction of another alkene moiety followed by ring closing metathesis resulted in a bicyclic compound