benzyl N-[(2S,3R)-2-hydroxy-1-[(R)-(4-methylphenyl)sulfinyl]decan-3-yl]carbamate   、                                                                                      
2,2-二甲氧基丙烷                                                                                                                                                              在
                                                                                                                                                                                 camphor-10-sulfonic acid                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以85%的产率得到benzyl (4R,5S)-4-heptyl-2,2-dimethyl-5-[[(R)-(4-methylphenyl)sulfinyl]methyl]-1,3-oxazolidine-3-carboxylate