(3aR)-2-甲基-5alpha-(乙酰氧基甲基)-6beta,7alpha-二乙酰氧基-3Aalpha,6,7,7Aalpha-四氢-5H-吡喃并[3,2-d]恶唑   、                                                                                      
Ethyl-O-(2,3,4,6-tetra-O-di-<α,α-D2>benzyl-β-D-galactopyranosyl)-(1->3)-2-azido-2-desoxy-4-O-di-<α,α-D2>benzyl-1-thio-β-D-galactopyranosid                                                                                                                                                              在
                                                                                                                                                                                 
对甲苯磺酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,2-二氯乙烷                                                                                  为溶剂,
                                                                                                                                                    反应 16.0h,
                                                                                                                以70%的产率得到Ethyl-O-(2,3,4,6-tetra-O-di-<α,α-D2>benzyl-β-D-galactopyranosyl)-(1->3)-O-<(2-acetamido-3,4,6-tri-O-acetyl-2-desoxy-β-D-glucopyranosyl)-(1->6)>-2-azido-2-desoxy-4-O-<α,α-D2>benzyl-1-thio-β-D-galactopyranosid