| 摘要 |
<p>Penem derivs. and analogues of formula (I) and their salts. R1 = H or 1-hydroxyethyl in which the OH is opt. protected; R2, R3 = H or a protecting gp.; X = CHR4 or S; R4 = H or 103C alkyl; Y = NR5R6, N = C(NR7R7)2, opt. protected OH, 1-3C alkoxy, hydrazino opt. substd. by 1-3C alkyl or NHOR8; R5, R6 = H, 1-5C alkyl, 3-4C alkenyl, aryl-(1-3C)alkyl, 1-5C substd. alkyl or pyridyl; or R5+ R6 form alkylene opt. interrupted by O, S or N-(1-3C)alkyl to complete an opt. substd. 3- to 7-membered cyclic amino gp. opt. contg. a double bond(s) in the ring; R7 = H or 1-3C alkyl; R8 = H, protecting gp. or 1-3C alkyl.</p> |
