Process for the preparation of pinacols

Details Process for the preparation of pinacols Process for the preparation of pinacols

1978-04-03

1979-08-07

Morgenstern, Norman

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

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

Patent

active

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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