3-(4-methylphenyl)sulfonyl-6-oxa-3,9,10-triazatetracyclo[6.3.0.02,4.05,7]undec-9-ene 、
(1α,2α,4α,5α,7α,8α)-3-(4-Methylphenylsulfonyl)-3-oxa-6,9,10-triazatetracyclo<6.3.0.02,4.05,7>undec-9-en 、 3-(4-methylphenyl)sulfonyl-6-oxa-3,9,10-triazatetracyclo[6.3.0.02,4.05,7]undec-9-ene 、 6-(4-methylphenyl)sulfonyl-3-oxa-6,9,10-triazatetracyclo[6.3.0.02,4.05,7]undec-9-ene 、
丙酮 以46%的产率得到