Synthesis of cis-bicyclo[4.3.0]non-2-ene derivatives. The potent homoisocarbacyclin analogs.

Synthesis of homoisocarbacyclin has been achieved efficiently by a general strategy with stereo- and regiochemical control. One of homoisocarbacyclin derivatives, 3-oxa homoisocarbacyclin analog (4), was shown to be potently active in inhibiting gastric ulcer. Another analog, conjugated diene derivative (5), was found to have a biological profile similar to prostacyclin.