乙酸酐 、
(5S,10S)-10-[(E)-3-(tert-Butyl-diphenyl-silanyloxy)-2-methyl-propenyl]-4-methoxy-2-oxo-1-oxa-spiro[4.5]deca-3,7-diene-7-carbaldehyde 在
三甲基氯硅烷 、 sodium iodide 作用下,
反应 0.67h,
以92%的产率得到Acetic acid (5S,10S)-10-[(E)-3-(tert-butyl-diphenyl-silanyloxy)-2-methyl-propenyl]-4-methoxy-2-oxo-1-oxa-spiro[4.5]deca-3,8-dien-(7E)-ylidenemethyl ester