[(Calix[4]OMe)TaCl2] (2), formed from [calix[4](OMe)(2)] (1) and TaCl5 via a demethylation reaction, undergoes exhaustive alkylation to [(calix[4]OMe)TaR(2)] (3-5), which give photochemically or thermally induced concerted dealkylation at the metal and at the methoxy group, to give [calix[4]TaR] (6-8). Double migration air alkyl groups has been observed in the reaction of 3-5 with CO and Bu(t)NC to form the corresponding eta(2)-ketones [(calix[4]OMe)Ta(eta(2)-COR(2))] (9-11) and eta(2)-imines [(calix[4]OMe)Ta{eta(2)-N(Bu(t))CR(2)}] (12-14).
Metal-Carbon and Carbon-Oxygen Related Reactivity in Tantalum p tert Butyl¬calix[4]arene Complexes Undergoing Organic Functionalization / B., Castellano; A., Zanotti Gerosa; E., Solari; C., Floriani; A., Chiesi Villa; Rizzoli, Corrado. - In: ORGANOMETALLICS. - ISSN 0276-7333. - 15:(1996), pp. 4894-4896. [10.1021/om960666v]
Metal-Carbon and Carbon-Oxygen Related Reactivity in Tantalum p tert Butyl¬calix[4]arene Complexes Undergoing Organic Functionalization
RIZZOLI, Corrado
1996-01-01
Abstract
[(Calix[4]OMe)TaCl2] (2), formed from [calix[4](OMe)(2)] (1) and TaCl5 via a demethylation reaction, undergoes exhaustive alkylation to [(calix[4]OMe)TaR(2)] (3-5), which give photochemically or thermally induced concerted dealkylation at the metal and at the methoxy group, to give [calix[4]TaR] (6-8). Double migration air alkyl groups has been observed in the reaction of 3-5 with CO and Bu(t)NC to form the corresponding eta(2)-ketones [(calix[4]OMe)Ta(eta(2)-COR(2))] (9-11) and eta(2)-imines [(calix[4]OMe)Ta{eta(2)-N(Bu(t))CR(2)}] (12-14).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
