| abstract |
The present invention provides compounds of the general formula (I)n n n n n n n n [Wherein R 1 and R 2 are alkyl, R 3 is hydrogen or ASO 2 , and A is especially optionally substituted substituted alkyl or phenyl,n n n Or R 2 and R 3 are hydrogen or alkyl, R 1 is ASO 2, orn n n Or R 1 , R 2 and R 3 are hydrogen or alkyl,n n n Or R 1 is ASO 2 or hydrogen, R 2 and R 3 form a protecting group,n n n Or R 3 is ASO 2 , and R 2 and R 3 form a protecting group,n n n Or R 1 is hydrogen and R 2 and R 3 form an alkyl or protecting group;n n n To a process for their preparation and to the use of racemic and optically active colchicine and thiocolquicin and their intermediates as well as analogs or derivatives thereof. |