HCID 23467841, compound → HCID 23467839, compound

Participants

Reaction Steps

Catalytic hydrogenation of 3-cyclopropylmethyl 9-methoxy-2,3-dihydro-1H-benzo[4,5]furo[3,2-e]isoquinolin-4[4H]-one (Example 4c) is carried out as in Example 4d but the reaction is stopped after one mole equivalent of hydrogen has been taken up, giving 3-cyclopropylmethyl-9-methoxy-2,6,7,7a-tetrahydro-1H-benzo[4,5]furo[3,2-e]isoquinolin-4[3H]-one. This, on treatment with m-chloroperbenzoic acid gives 3-cyclopropylmethyl-4a,5-epoxy-9-methoxy-2,4a,5,6,7,7a-hexahydro-1H-benzo[4,5]furo[3,2-e]isoquinolin-4[3H]-one which is reduced with lithium aluminum hydride to 3-cyclopropylmethyl-9-methoxy-2,3,4,4a,5,6,7,7a-octahydro-1H-benzo[4,5]furo[3,2-e]isoquinolin-4a-ol.

Provenance & Evidence