- New reagent system for attaining high regio- and stereoselectivities in allylic displacement of 4-cyclopentene-1,3-diol monoacetate with aryl- and alkenylmagnesium bromides.
New reagent system for attaining high regio- and stereoselectivities in allylic displacement of 4-cyclopentene-1,3-diol monoacetate with aryl- and alkenylmagnesium bromides.
Organic letters (2005-01-14)
Yuichi Kobayashi, Kenya Nakata, Takayuki Ainai
PMID15646953
ANOTACE
[Reaction: see text] Low regioselectivity of RMgBr (R = aryl, alkenyl) in the CuCN-catalyzed reaction with 4-cyclopentene-1,3-diol monoacetate is improved by addition of LiCl or MgCl2 to a similar extent as previously obtained with RMgCl (>90:10). The limitation encountered in the preparation of RMgCl no longer exists in the present method using RMgBr. The method is utilized in the synthesis of AH-13205, a selective EP2-receptor agonist.
MATERIÁLY
Číslo produktu
Značka
Popis produktu