反应详情

An 80 ml, two-necked, pyrex glass Schlenk reaction tube containing a Teflon coated magnetic stir bar was swept thoroughly with nitrogen and maintained in an air-free condition. The tube was charged with 9.5 g (42.5 mmoles) of 4-t-butylphenyl vinyl sulfone, 7.0 g (42.5 mmoles) of trimethyltin hydride and 10 ml. of toluene, stoppered, and placed in a 20°C water bath. The tube was irradiated for 35 hours by a 100 watt mercury vapor lamp which was situated in a large test tube and placed in the same bath 5-10 cm. from the reaction tube. Solvent was stripped off at reduced pressure on a rotary evaporator. Recrystallization of the solid product from cyclohexane gave 11.4 g of 2-(4-t-butylphenylsulfonyl)ethyltrimethylstannane, m.p. 118°-120°C. The presence of both the sulfonyl and trimethyltin groups was indicated by the strong infrared absorption bands at 1310 cm-1, 1262 cm-1, 1145 cm-1 (--SO2 --) and 770 cm-1 ((CH3)3Sn) using a KBr disc. Nuclear magnetic resonance spectroscopy (NMR) showed the following:

1. additionAn 80 ml, two-necked, pyrex glass Schlenk reaction tube containing a Teflon coated magnetic stir bar
2. temperaturemaintained in an air-free condition
3. customplaced in a 20°C
4. customwas situated in a large test tube
5. customSolvent was stripped off at reduced pressure on a rotary evaporator
6. customRecrystallization of the solid product from cyclohexane