Treatment of α-halo carbonyl compounds with title Sn-Al or Pb-Al reagents provides enolates which react with aldehydes or ketones to give β-hydroxy carbonyl compounds effectively.
Facile routes to boron enolates. Et3B-mediated Reformatsky type reaction and three components coupling reaction of alkyl iodides, methyl vinyl ketone, and carbonyl compounds
作者:Kyoko Nozaki、Koichiro Oshima、Kiitiro Utimoto
DOI:10.1016/0040-4039(88)85330-9
日期:——
Reaction of α-bromoketones with Ph3SnH in the presence of Et3B provides boron enolates which react with carbonyl compounds to give β-hydroxyketones in good yields. Et3B-induced Reformatsky type reaction of α-iodoketones with an aldehyde or ketone proceeds without Ph3SnH.
A novel one-pot reformatsky type reaction via bismuth salt in aqueous media
作者:Zhen Shen、Jinqi Zhang、Huixian Zou、Minmin Yang
DOI:10.1016/s0040-4039(97)00456-5
日期:1997.4
In the presence of bismuth(III)chloride-metallic aluminum, α-halo carbonyl compounds react with aldehydes in water under mild conditions to give β-hydroxy carbonyl compounds with stereoselectivity in good yields.