| 摘要 |
PCT No. PCT/JP95/01716 Sec. 371 Date Feb. 26, 1997 Sec. 102(e) Date Feb. 26, 1997 PCT Filed Aug. 30, 1995 PCT Pub. No. WO96/07635 PCT Pub. Date Mar. 14, 1996A process for producing a compound of the formula (I): wherein R is hydrogen or an alkyl group, and R3 and R4 are hydrogen or an alkyl group, which comprises reacting a compound of the formula (II): wherein R1 is an optionally substituted alkyl group or an optionally substituted phenyl group, with a compound of the formula (III):HNR3R4(III)wherein each symbol is as defined above, and optionally alkylating the resulting compound. Intermediates for this process are also provided.
|
