Convenient synthesis of 5-substituted-6-methoxy or 6-hydroxy-2,3-dihydro-1,4-benzodioxins via lithiated intermediates
摘要:
The 6-methoxy and 6-tetrahydropyranyloxy-2,3-dihydro-1,4-benzodioxins can be lithiated at the 5-position to give intermediate lithio derivatives which react with various electrophiles to afford, after hydrolysis, 5-substituted-6-methoxy and 6-hydroxy-2,3-dihydro-1,4-benzodioxins.
Convenient synthesis of 5-substituted-6-methoxy or 6-hydroxy-2,3-dihydro-1,4-benzodioxins via lithiated intermediates
摘要:
The 6-methoxy and 6-tetrahydropyranyloxy-2,3-dihydro-1,4-benzodioxins can be lithiated at the 5-position to give intermediate lithio derivatives which react with various electrophiles to afford, after hydrolysis, 5-substituted-6-methoxy and 6-hydroxy-2,3-dihydro-1,4-benzodioxins.
A synthesis of a benzodioxinic analog of 8-methoxypsoralen (8-MOP), in 12 steps from the commercially available 6-acetyl-2,3-dihydro-1,4-benzodioxin, is described.