摘要:
A process for producing 2-aminomalonic acid derivatives of general formula (1) (wherein A is linear or branched alkylene having 1 to 10 carbon atoms; R1 is linear or branched alkyl having 2 to 20 carbon atoms; R?2 and R3¿ may be the same or different and each represents lower alkyl or aralkyl; and R4 is a protective group) characterized by reducing compounds of general formula (6) (wherein A, R?1, R2, R3 and R4¿ are each as defined above.
摘要:
A process for preparing 2-amino malonic acid derivatives of formula (1): wherein A is linear or branched chain alkylene having from 1 to 10 carbon atoms, R 1 is linear or branched chain alkyl having from 2 to 20 carbon atoms, R 2 and R 3 are the same or different, and are lower alkyl or aralkyl, and R 4 is a protecting group, which process comprises the steps of reducing a compound of formula (6): wherein A is linear or branched chain alkylene having from 1 to 10 carbon atoms, R 1 is linear or branched chain alkyl having from 2 to 20 carbon atoms, R 2 and R 3 are the same or different, and are lower alkyl or aralkyl, and R 4 is a protecting group.
摘要:
This invention relates to an immunosuppressant comprising an effective amount of at least one compound selected from among compounds represented by formula (I), (wherein R represents a hydrogen atom or an acyl group, Y represents carbonyl or hydroxymethylene group, and symbol ----- represents either a single bond or a double bond) and their lactones and a pharmaceutically acceptable carrier, a method of prophylaxis and treatment of immunorejection or autoimmune diseases comprising administering an effective amount of the above-described compound or its lactone, and a novel compound represented by formula (II) and its lactone.