| 摘要 |
Title compds. (I; n = 1 or 2; Ra, Rb = C1-6 alkyl; Rc = C1-9 alkyl or PhCH2; Rd = C1-6 alkyl; Rc,Rd = tetra or pentamethylene; R3, Rf = H or C3-4 alkenyl; X = O or NR; R = H or C7-9 aralkyl; R1 = H or CH2CH(OR5)R4; R4 = Me or Ph; R5 = H or ACO; A = C1-12 alkyl, Ph, or a ph or phenylethyl subtd. by two C1-4 alkyl and OH; R2 = a group of formula(III); R6, R7 = C1-9 alkyl or C7-9 aralkyl; R8 = H or Me) useful as stabilizers which protect plastics against degradation by O2 heat and light, were manufd. by reaction of II and n mole hydroxybenzyldithiocarbonate.
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