An Expeditious Access to Enantiomerically Purecis-Dialkyl-Substitutedγ- andδ-Lactones
摘要:
A facile general route to enantiomerically pure 3,4-cis-dialkyl-substituted gamma -lactones and 4,5-cis-dialkyl-substituted delta -lactones by TiCl4-mediated Evans asymmetric aldolization as the key step is exemplified by synthesis of cis-(3R,4R)-3-methyldecan-4-olide and (4R,5R)-aerangis lactone.