(5R,6S)-5-Methylsulfanyl-4-pyrrolidin-1-yl-6-[(R)-1-((4R,5R)-2,2,5-trimethyl-[1,3]dioxan-4-yl)-ethyl]-5,6-dihydro-pyran-2-one 在
偶氮二异丁腈 、
三正丁基氢锡 作用下,
以90%的产率得到(R)-4-Pyrrolidin-1-yl-6-[(S)-1-((4R,5R)-2,2,5-trimethyl-[1,3]dioxan-4-yl)-ethyl]-5,6-dihydro-pyran-2-one