| 释义 |
pinacol Chem.|ˈpɪnəkɒl|
[f. pinacone + -ol.]
= pinacone; pinacol rearrangement, a reaction typified by the conversion of pinacol into pinacolone, in which a 1,2-glycol loses water on heating with acid to form a ketone.
1911Chem. Abstr. V. 3561 The solid pinacols have normal mol. wts. in dil. C6H6. 1912Ibid. VI. 82 The fraction b. 214° of the products of hydrolysis of crude pinacol by H2SO4. 1936L. J. Desha Org. Chem. 538 The pinacol rearrangement is irreversible in the sense that pinacolins do not change into pinacols. 1938E. S. Wallis in H. Gilman Org. Chem. I. 723 Numerous examples of this reaction, now known as the pinacol rearrangement, have been found since the time of Fittig's discovery [in 1859]. 1964N. G. Clark Mod. Org. Chem. x. 180 Acetone is reduced with amalgamated magnesium to pinacol. 1966McGraw-Hill Encycl. Sci. & Technol. III. 375/2 Ketones are converted to tetrasubstituted ethylene glycols (called pinacols) by certain reducing agents. 1966Smith & Cristol Org. Chem. xiii. 289 The pinacol rearrangement is quite general for glycols in which all four groups..are alkyl or aryl groups. |