potassium (E)-2-oxo-4-phenylbut-3-enoate 在
copper(II) bis[bis((trifluoromethyl)sulfonyl)amide] 、
4,5-dihydro-2-(2-(4,5-dihydrooxazol-2-yl)propan-2-yl)oxazole 、
乙酰氯 作用下,
反应 17.0h,
生成 (2R,4R)-methyl 4-phenyl-2-(triisopropylsilylmethyl)-3,4-dihydro-2H-pyran-6-carboxylate 、 (2S,4R)-methyl 4-phenyl-2-(triisopropylsilylmethyl)-3,4-dihydro-2H-pyran-6-carboxylate 、
(2S,4S)-methyl 4-phenyl-2-(triisopropylsilylmethyl)-3,4-dihydro-2H-pyran-6-carboxylate 、 (2R,4S)-methyl 4-phenyl-2-(triisopropylsilylmethyl)-3,4-dihydro-2H-pyran-6-carboxylate