(1S,3R)-1-(2-Hydroxy-2-methyl-propyl)-2-(toluene-4-sulfonyl)-2,3,4,9-tetrahydro-1H-β-carboline-3-carboxylic acid benzyl ester                                                                                                                                                              在
                                                                                                                                                                                 
2,3,4,5,6,6-六氯-2,4-环己二烯-1-酮                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙二醇二甲醚   、                                                                                         
水                                                                                  为溶剂,
                                                                                                                                                                                        以78%的产率得到(1S,3R)-4a-Hydroxy-1-(2-hydroxy-2-methyl-propyl)-2-(toluene-4-sulfonyl)-2,3,4,4a-tetrahydro-1H-β-carboline-3-carboxylic acid benzyl ester