Lipid derivatives their preparation and use.

摘要

Lipid derivatives represented by the formula: <CHEM> wherein R1 is alkyl or alkylcarbamoyl; R2 is lower alkyloxy, lower alkylcarbamoyloxy, lower alkylcarbonylamino, lower alkyloxycarbonylamino, lower alkylureido, lower alkyloxymethyl, lower alkylcarbonylmethyl, cyanomethyl, heterocyclic group, or heterocyclyloxy; R2 min is hydrogen or R2 and R2 min taken together form -O(CH2)m- wherein m is an integer of 1 to 5; R3, R4, and R5 each is hydrogen or lower alkyl or two or three of R3, R4, and R5 taken together with the adjacent nitrogen atom form cyclic ammonio; R5 is hydrogen or lower alkylcarbonyl; X<-> is a counter anion; Y is oxygen or sulfur; and n is an integer of 1 to 10, being useful as PAF antagonists, e.g., as antithrombotic, antivasoconstricting, antibronchoconsticting agent or antitumor agent.