Methyl iodide, with triphenyl

Methylenecyclopropanes, 50, 30 3-Methylheptan-4-ol, 52, 22 Methyl iodide, with triphenyl phosphite and cyclohexanol,... 

Methylcyclohexene, from 2-methyl-cyclohexanone tosylhydrazone and methyllithium, 51,69 Methylenecyclopropanes, 50,30 Methyl iodide, with triphenyl phosphite and cyclohexanol, 51,45 with triphenyl phosphite and neopentyl alcohol, 51,44 METHYL ftrans-2-IODO-l-TETRA-LIN)CARBAMATE, 51,112 Methyl (frans-2-iodo-l-tetralin)carba-mate, with potassium hydroxide to give 1,2,3,4-tetrahydronaph-thalene(l,2)imine, 51,53 Methyllithium, with camphor tosylhydrazone to give 2-bomene, 51, 66... 

Heating with alkyl iodides at 100° C. gives arsonium compounds, e.g. triphenylarsine di-iodide is converted by methyl iodide into triphenyl-methylarsonium tri-iodide. When the dihalides contain aliphatic and aromatic groupings, decomposition may occur as follows on heating ... 

A difficulty in the synthesis of the phosphorylide in the Wittig reaction is to add an equimolar amount of base to the alkyl halide. The use of epichlorohydrine, which forms one equivalent of base in situ by the reaction with iodide ions, obtained from the reaction of a C-labeled alkyl iodide with triphenyl phosphine is one method to overcome the problem. Some examples of useful precursors prepared from [ C] methyl iodide are shown in O Fig. 41.7. 

The aHphatic iodine derivatives are usually prepared by reaction of an alcohol with hydroiodic acid or phosphoms trHodide by reaction of iodine, an alcohol, and red phosphoms addition of iodine monochloride, monobromide, or iodine to an olefin replacement reaction by heating the chlorine or bromine compound with an alkaH iodide ia a suitable solvent and the reaction of triphenyl phosphite with methyl iodide and an alcohol. The aromatic iodine derivatives are prepared by reacting iodine and the aromatic system with oxidising agents such as nitric acid, filming sulfuric acid, or mercuric oxide. 

Cyclohexanediol, from hy-droquinone, 51, 105 Cyclohexanol, with triphenyl phosphite and methyl iodide,... 

Triphenyl phosphite, with methyl iodide and cyclohexanol,... 

A. Neopentyl iodide. A 500-ml. two-necked round-bottomed flask is fitted with a reflux condenser to which is attached a calcium chloride drying tube. One hundred thirty-six grams (115 ml., 0.44 mole) of triphenyl phosphite, 35.2 g. (0.4 mole) of neopentyl alcohol, and 85 g. (37 ml., 0.60 mole) of methyl iodide (Note 1) are added to the flask, and a thermometer is inserted that is of sufficient length to extend into the liquid contents of the flask. The mixture is heated under gentle reflux... 

The betaines 297 are easily prepared from a pyrylium salt and the appropriate 4-aminophenol followed by deprotonation. Typically, 2,4,6-triphenyl-pyridinium iodide and 4-aminophenol give the blue-black betaine (297 R = R = Ph, R = H) which also occurs as a red hexahydrate. With methyl iodide this compound gives 7V-(p-methoxyphenyl)-2,4,6-triphenyl-pyridinium iodide. 10,221... 

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