1,5-Diazabicyclo(4.3.0)non-5-ene → HCID 54266634, compound

Participants

Reaction Steps

A 50 ml flask was charged with 1.38 g (2.5 mmoles) of 1-acetoxy-6-bromo-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-9-phenylsulfonyl-2,7-nonadiene (17) obtained in Example 14, 15 ml of methylene chloride, and 0.6 ml (5 mmoles) of 1,5-diazabicyclo[4.3.0]non-5-ene. The mixture was stirred for 5 hours under reflux. The reaction mixture was worked up by the same operation as in Example 22, to give 0.99 g (yield 84%) of 1-acetoxy-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-9-phenylsulfonyl-2,6,8-nonatriene (19).

Provenance & Evidence