(4-Oxo-3,5-dioxa-4λ5-phospha-cyclohepta[2,1-a;3,4-a']dinaphthalen-4-yl)-acetic acid methyl ester 、
(1S,3R,7R,11S,15S,17R,21R,23S,25S,E)-17-((R)-1-((benzyloxy)methoxy)ethyl)-21-((tert-butyldiphenylsilyl)oxy)-11-methoxy-10,10,26,26-tetramethyl-5,12,19-trioxo-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-25-yl acetate 在
sodium hexamethyldisilazane 作用下,
以
四氢呋喃 为溶剂,
以13 mg的产率得到(Z)-methyl 2-((1S,3S,7R,11S,15S,17R,21R,23S,25S,E)-25-acetoxy-17-((R)-1-((benzyloxy)methoxy)ethyl)-21-((tert-butyldiphenylsilyl)oxy)-11-methoxy-10,10,26,26-tetramethyl-12,19-dioxo-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-5-ylidene)acetate