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 <\/p>\n

Thestartingmaterial(2.20g9mmol)in15mLofDCMwascooledto-20\u00b0C,thenEt2NSF3(2.47mL,18.7 mmol) was added. After1minutes, the cooling bath was removed, and the mixture was stirred overnight.NaHCO3solution was added slowly to the mixture andthemixture was extracted with dichloromethane (3X).Thecombined organicsweredriedwithNa2SO4and purified with flash chromatography (10percent ethyl ACETATE\/HEXANE) to provide the difluoroester (1.81 g, 91percent).<\/p>\n

 <\/p>\n

DAST\u5c06\u9187\u8f6c\u5316\u6210\u4e3a\u76f8\u5e94\u6c1f\u5316\u7269\u7684\u53cd\u5e94\u4e00\u822c\u60c5\u51b5\u4e0b\u5728\u975e\u5e38\u6e29\u548c\u7684\u6761\u4ef6\u4e0b\u8fdb\u884c\u3002\u901a\u5e38\u5728\u201378\u2103\u4e0b\u52a0\u6599\u6765\u6291\u5236\u6700\u521d\u7684\u653e\u70ed\u8fc7\u7a0b\uff0c\u53cd\u5e94\u6761\u4ef6\u6bd4\u8f83\u82db\u523b\uff0c\u6b64\u6761\u4ef6\u4e0b\u7684\u7a33\u5b9a\u6027\u8f83\u5dee\u3002\u5fae\u5316\u5de5\u8fde\u7eed\u6d41\u6280\u672f\u5b8c\u5168\u53ef\u4ee5\u5bc6\u95ed\u6761\u4ef6\u4e0b-10\u2103\u4e0b\u5b8c\u6210\u9ad8\u6548\u6c1f\u5316\u8fc7\u7a0b\u3002<\/p>\n

 <\/p>\n

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 <\/p>\n","protected":false},"excerpt":{"rendered":"

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