(2R,3R)-[3-(tert-Butyldimethylsilanyloxy)-2-methylpyrrolidin-2-yl]methanol trifluoroacetic acid salt   、                                                                                      
N,N-二异丙基乙胺   、                                                                                      
3-Chloro-2-methylphenylacetamide   、                                                                                      
二氯甲烷                                                                                                                                                              在
                                                                                                                                                                                 ice   、                                                                                                  
水   、                                                                                                  
二氯甲烷   、                                                                                                  Brine   、                                                                                                  
magnesium sulfate   、                                                                                                  solvent B                                                                                                                                  作用下,
                                                                                                                                                                                        反应 2.67h,
                                                                                                                以UV detection at 220 nm) to provide the title compound (17 mg) as a white film (LC/MS m/z 438 [M+H]+) and di-acylated product (80 mg) as a white solid (LC/MS m/z 630 [M+H]+)的产率得到(2R,3R)-3-(tert-Butyldimethylsilanyloxy)-2-hydroxymethyl-2-methylpyrrolidine-1-carboxylic acid (3-chloro-4-cyano-2-methyl-phenyl)-amide