... Thanks are due to Deutsche Forschungsgemeinschaft and Fonds der Chemischen Industrie for generous support of this work and to Prof. ... Ber. 119 (1986) ... 'H NMR (250 MHz, -CsDs): 6 = 1.17 (S; 9H, C(CH&), 1.30 (S; 9H, C(CH&), 2.34 (S; 2H, CH). CAS Registry Numbers ...