亚磷酸三苯酯和碘甲烷经济体制碘代反应是什么机理？

he internal temperature has risen to about 120°. At this point the mixture isdark and viscous. The flask is cooled, and 40 g.(0.40 mole) of cyclohexanolis added to the oily methyltriphenoxyphosphoniumiodide. The mixture is shaken gently until homogeneous and allowedto stand overnight at room temperature. The mixture is distilled through a13-cm. Vigreux column, yielding 62.5–63 g.(74–75%) of iodocyclohexane, b.p. 66–68° (12 mm.), nD22 1.5475.

【Organic Syntheses, Coll. Vol. 6, p.830; Vol. 51, p.44 】

To a solution of methyltriphenoxyphosphoniumiodide(2.3 mmol) in anhydrous dimethylformamide was added alcohol(2 mmol) at room temperature. Afterstirred for 18 h, the solvent was removed in vacuo and the residue wasdissolved in chloroform, extracted with 5% sodium thiosulfate, washed withwater and dried. Direct crystallizationfrom chloroform-hexane gave the iodide in 77% yield as needles.

【J. A. C. S. 1964, 2093-2095 】

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