Process for the preparation of pinacols

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

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260308R, 260563R, 260563P, 260570AB, 2605705R, 2605705P, 2605705CA, 2605705S, 2605706, 2605707, 260571, 260573, 260575, 260576, 260577, 260578, 260583E, 260583EE, 260583GG, 260583P, 260584R, 260584C, 260609E, 260609F, 568630, 568631, 568632, 568633, 568634, 568641, 568643, 568644, 568645, 568648, 568649, 568655, 568656, 568658, 568660, 568661, 568662, 568663, 568664, 568669, 568670, 568677, 568676, 568678, 568679, 568680, 568715, 568807, 568811, 568816, 568821, 568827, 568838, 568842, 568846, 568862, C07C 2

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041638654

ABSTRACT:
An improvement in a process for the preparation of a pinacol of the formula ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and represent optionally substituted aliphatic, cycloaliphatic, araliphatic or an aromatic hydrocarbon radical by reducing a ketone of the formula ##STR2## wherein R.sup.1 and R.sup.2 have the abovementioned meanings with a base metal, the improvement comprising carrying out the reduction in the presence of an organic halogen compound and in the presence of a phosphoric acid amide, phosphoric acid ester and/or carboxylic acid amide.

REFERENCES:
patent: 1752016 (1930-03-01), Maximoff
Houben-Wexl, "Methoden der Organische Chemie", vol. 7/26, 4th Ed., p. 2002 (1976).
"Organic Synthesis", vol 14, p. 9 (1934).
"J.A.C.S.", vol. 49, p. 241 (1925).
"J.A.C.S.", vol. 55, p. 1181 (1933).
Oxama, "J. Org. Chem., vol. 1965, pp. 2429-2432.
"Chem. Reviews," vol. 57, p. 424.

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