Highly diastereoslective synthesis of di- and trisubstituted 4-butanolides from aldehydes and ketones via three-carbon-extension by allylic homoenolate reagents
作者:Dieter Hoppe、Alfons Brönneke
DOI:10.1016/s0040-4039(00)81745-1
日期:1983.1
Lithiated or titanated O-allyl carbamates 7 or 8 add to aldehydes and ketones regio- and diastereoselectively to yield O-(4-hydroxy-1-alkenyl) carbamates 9, which are converted to λ-lactones 12 with an one-pot procedure.
锂化或钛酸化的O-烯丙基氨基甲酸酯7或8选择性和非对映地加到醛和酮中,生成O-(4-羟基-1-烯基)氨基甲酸酯9,通过一锅法将其转化为λ-内酯12。