Process for preparing 2,3-dihydro-1,3-dialkyl-2,3-dialkyl perimi

Details Process for preparing 2,3-dihydro-1,3-dialkyl-2,3-dialkyl perimi Process for preparing 2,3-dihydro-1,3-dialkyl-2,3-dialkyl perimi

1990-08-06

1992-03-17

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

534577, 534754, 534762, 564413, C07D23970, C07C20962

Patent

active

050970291

ABSTRACT:
Processes for preparing 2,3-dihydro-1,3-dialkyl-2,2-dialkyl perimidines and N,N'-dialkyl-1,8-naphthalene diamines are disclosed. The 2,3-dihydro-1,3-dialkyl-2,2-dialkyl perimidines are prepared by alkylating 2,3-dihydro-2,2-dialkyl perimidines with an alkylating agent in a water miscible organic solvent at room temperature to 80.degree. C. in the presence of water and an inorganic base. N,N'-dialkyl-1,8-naphthalene diamines are prepared by hydrolyzing the 2,3-dihydro-1,3-dialkyl-2,2-dialkyl perimidines with strong aqueous acid in an aqueous organic solvent and removing a ketone by-product and the aqueous organic solvent by codistillation.

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