(1S,2S,2'R,3'S,4S,4a'R,5S,7a'R)-2-allyl-4-((benzyloxy)methyl)-3',5-dimethyl-2'-((2R,4S)-4-methylhex-5-en-2-yl)tetrahydro-4'H,5'H-spiro[cyclohexane-1,7'-furo[3,4-b]pyran]-4',5'-dione 、
碘甲烷 在
potassium carbonate 作用下,
以
乙腈 为溶剂,
反应 2.0h,
以76 mg的产率得到(2R,2'S,3S,4'S,4aR,5'S,7S,7aR)-3,4a,5'-trimethyl-2-[(2R,4S)-4-methylhex-5-en-2-yl]-4'-(phenylmethoxymethyl)-2'-prop-2-enylspiro[3,7a-dihydro-2H-furo[3,4-b]pyran-7,1'-cyclohexane]-4,5-dione