2,2-Dimethyl-propionic acid (2S,3S,4S)-3-hydroxy-2-methyl-3,4-dihydro-2H-pyran-4-yl ester 、
3,4-di-O-acetyl-2,6-dideoxy-1-phenylthio-α-L-arabino-pyranoside 在
4 A molecular sieve 、 Selectfluor 、 Amberlyst A-21 、 trimethylammoniomethyl-polymer borohydride 作用下,
以
乙腈 、
异丙醇 为溶剂,
生成
2,2-Dimethyl-propionic acid (2S,3S,4S)-3-((2S,4S,5S,6S)-4,5-diacetoxy-6-methyl-tetrahydro-pyran-2-yloxy)-2-methyl-3,4-dihydro-2H-pyran-4-yl ester