N-(3',4'-dihydroxy-trans-cinamoyl)-3-(3,4-dihydroxylphenyl)-D-alanine methyl ester tetra (t-butyldimethylsilyl)ether                                                                                                                                                              在
                                                                                                                                                                                 
劳森试剂                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 17.0h,
                                                                                                                以77%的产率得到3-(3,4-dihydroxy-phenyl)-(R)-2-[3-trans-(3,4-dihydroxy-phenyl)-thioacryloylamino]-propionic acid methyl ester tetra(t-butyl dimethylsilyl)ether