dimethyl 2-((1R,2R)-2-methyl-1-(4-nitrophenyl)-3-oxopropyl)malonate 在
sodium cyanoborohydride 、
溶剂黄146 作用下,
以
四氢呋喃 为溶剂,
生成
(3R,4R,5R)-methyl 5-methyl-4-(4-nitrophenyl)-2-oxo-tetrahydro-2H-pyran-3-carboxylate 、 methyl 5-methyl-4-(4-nitrophenyl)-2-oxo-tetrahydro-2H-pyran-3-carboxylate