(1SR,5RS,6SR,7RS)-(+/-)-6-<(1,1-dimethylethyl)diphenylsilyloxymethyl>-7-(tetrahydro-2H-pyran-2-yloxy)-2-oxabicyclo<3.3.0>octane-3-one                                                                                                                                                              在
                                                                                                                                                                                 
正丁基锂   、                                                                                                  
二异丁基氢化铝                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 19.0h,
                                                                                                                生成                                                 
(1S,2R,3S,4R)-3-(tert-Butyl-diphenyl-silanyloxymethyl)-2-(2-[1,3]dithian-2-ylidene-ethyl)-4-(tetrahydro-pyran-2-yloxy)-cyclopentanol