FIELD: organic chemistry and technology. SUBSTANCE: product: compound of the formula (I) where: each adjacent pair R1 and R2, R3 and R4, or R5 and R6 means independently: (a) two adjacent hydrogen atoms, or (b) can form other bond with carbon atoms with that they were bound; R2 - alkyl-group; R7 means hydrogen atom, hydroxyl group, protected hydroxyl group or alkoxyl group or forms together with R1 hydroxy-group; R8 and R9 mean independently hydrogen atom or hydroxyl group; R10 means hydrogen atom, alkyl, group, alkyl group substituted with one or some hydroxyl groups, alkenyl group, alkenyl group substituted with one or some hydroxyl groups or alkyl group substituted with oxo-group; X1 means hydrogen atom or hydroxyl group, or X2 and X1 can form together oxo-group or X2; -CH2O- means hydrogen atom or hydroxyl group; Y1 means hydrogen atom, or Y2 and Y1 can mean together oxo-group, N-Y2 or N--NR11R12; OR13 and R11 are independently hydrogen atom, alkyl group, aryl group or tosyl group; each of R12 and R13, R14, R15, R16, R17, R18, R19, R22 means independently hydrogen atom or alkyl group; R23 and R20 each means oxo-group or independently (R2 and hydrogen atom) or (R
Authors
Dates
1997-05-20—Published
1991-11-06—Filed