5-Chlormethyl-6-hydroxy-3,4-dihydro-1(2H)-naphthalinon   、                                                                                      
巯基乙酸甲酯                                                                                                                                                              在
                                                                                                                                                                                 
巯基乙酸甲酯   、                                                                                                  silica gel   、                                                                                                  hexanes ethyl acetate acetic acid                                                                                                                                  作用下,
                                                                                                                                                                                        反应 16.0h,
                                                                                                                以to give 219 mg (52%) of the desired compound as a colorless glass的产率得到(2-Hydroxy-5-oxo-5,6,7,8-tetrahydro-naphthalen-1-ylmethylsulfanyl)acetic acid methyl ester