1-(but-3-en-2-yl) 3-methyl 2-(diphenylsulfuranylidene)malonate 在
(3aR,3a''R,8aR,8a''R)-N
6,N
6,N
6'',N
6''-tetrakis((R)-1-phenylethyl)-4,4,4'',4'',8,8,8'',8''-octa-4-(tert-butyl)phenyl octahydrodispiro[[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepine-2,1'-cyclohexane-4',2''-[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepine]-6,6''-diamine bisgoldchloride 、
双三氟甲烷磺酰亚胺银盐 作用下,
以
甲苯 为溶剂,
以72%的产率得到methyl (1S,4S,5R)-4-methyl-2-oxo-3-oxabicyclo[3.1.0]hexane-1-carboxylate