1-[4,5-dimethoxy-6-methoxymethyl-3-(tetrahydrofuran-2-yloxymethoxy)tetrahydropyran-2-yl]-2-phenylethylcarbamic acid tert-butyl ester 在
4 A molecular sieve
sodium acetate 、 sodium thiosulfate 、 N-methylquinolinium hexafluorophosphate 、
air 作用下,
以
1,2-二氯乙烷 、
甲苯 为溶剂,
反应 2.5h,
生成 7,8-dimethoxy-6-methoxymethylhexahydropyrano[3,2-d][1,3]dioxin-4-yl-carbamic acid tert-butyl ester 、 7,8-dimethoxy-6-methoxymethylhexahydropyrano[3,2-d][1,3]dioxin-4-yl-carbamic acid tert-butyl ester