α-Diphenylphosphinoyl ketones are selectively and sequentially alkylated at the α-position. Double lithiation and selective alkylation occurs at the less stabilised γ-position. Dephosphinoylation of the alkylation products gives ketones. Mono-alkylation is selective, highly crystalline intermediates are formed and a one-pot strategy is possible. The method is ideally suited for the preparation of acid-sensitive ketones.
α-
二苯基膦酰基酮在α位上选择性且顺序性地进行烷基化。双
锂化和选择性烷基化发生在较不稳定的γ位。脱膦酰化得到的烷基化产物是酮。单烷基化具有选择性,形成的中间体晶体高度结晶,且可以进行一步完成的方法。该方法非常适合制备酸敏感的酮。