(1S,3'R,4'S,5'R,6'R)-3',4',5'-tris(benzyloxy)-6'-(benzyloxymethyl)-6-[(4-ethynylphenyl)methyl]-3',4',5',6'-tetrahydro-5-methyl-spiro[isobenzofuran-1(3H),2'-[2H]pyran] 、
碘甲烷 在
正丁基锂 作用下,
以
四氢呋喃 、
正己烷 为溶剂,
反应 3.0h,
以90%的产率得到(1S,3'R,4'S,5'S,6'R)-3',4',5'-tris(benzyloxy)-6'-(benzyloxymethyl)-3',4',5',6'-tetrahydro-5-methyl-6-[(4-(propyn-1-yl)phenyl)methyl]-spiro[isobenzofuran-1(3H),2'-[2H]pyran]