(5S,6S,7R,8S)-6,7,8-tris-benzyloxy-5-[4-chloro-3-(4-ethoxy-benzyl)-phenyl]-4-oxa-spiro[2.5]octane-1-carboxylic acid ethyl ester 、
Lithium aluminium hydride 、
Sodium sulfate-III 在
乙酸乙酯 、 crude product 、
{(5S,6S,7R,8S)-6,7,8-tris-benzyloxy-5-[4-chloro-3-(4-ethoxy-benzyl)-phenyl]-4-oxa-spiro[2.5]oct-1-yl}-methanol 、
{(5S,6S,7R,8S)-6,7,8-tris-benzyloxy-5-[3-(4-ethoxy-benzyl)-phenyl]-4-oxa-spiro[2.5]oct-1-yl}-methanol 作用下,
以
四氢呋喃 为溶剂,
反应 4.0h,
以furnished 300 mg mixture of {(5S,6S,7R,8S)-6,7,8-Tris-benzyloxy-5-[4-chloro-3-(4-ethoxy-benzyl)-phenyl]-4-oxa-spiro[2.5]oct-1-yl}-methanol and {(5S,6S,7R,8S)-6,7,8-Tris-benzyloxy-5-(3-[4-ethoxy-benzyl)-phenyl]-4-oxa-spiro[2.5]oct-1-yl}-methanol的产率得到{(5S,6S,7R,8S)-6,7,8-tris-benzyloxy-5-[3-(4-ethoxy-benzyl)-phenyl]-4-oxa-spiro[2.5]oct-1-yl}-methanol