(1a'R,7a'S)-5'-chloro-6'-hydroxy-1a',7a'-dihydro-7'H-spiro[naphtho[1,8-de][1,3]dioxine-2,2'-naphtho[2,3-b]oxiren]-7'-one 在
甲醇 、 sodium tetrahydroborate 作用下,
以
四氢呋喃 为溶剂,
反应 4.0h,
以71%的产率得到(1'aR,2'R,7'aR)-4'-chlorospiro[2,4-dioxatricyclo[7.3.1.05,13]trideca-1(12),5,7,9(13),10-pentaene-3,7'-2,7a-dihydro-1aH-naphtho[2,3-b]oxirene]-2',3'-diol