Stereochemical reassignment of the isomeric 2,4a,6,8a-tetramethyl-3,4,4a,7,8,8a-hexahydro-〈1,5〉naphthyridine and 2,5,2′,5′-tetramethyl-5,5′-bi-Δ1-pyrrolinyl, and oftheir dioxides
摘要:
The stereochemical relationships between the isomeric 5,6-dimethyl-5,6-dinitrodecane-2,9-diones and their reduction products (the: title compounds) have been established. (C) 1999 Elsevier Science Ltd. All rights reserved.
A Ti4+-exchanged montmorillonite (Ti4+-mont) and a hydrotalcite (HT) are strong solid Brønsted acid and base, and these two clay catalysts could be used in a single reactor without neutralization of active sites. Because the Ti4+-mont have active acid site in the narrow interlayers, the base sites of large HT particles show no interaction with the acid sites. A variety of acid and base reactions, such as esterification, acetalization, deacetalization, aldol reaction, Michael reaction, and epoxidation, proceeded using both the Ti4+-mont and the HT in a single reactor.
Electrogenerated bases. 5. Electrogenerated superoxide-initiated autoxidation. A convenient electrochemical method for the conversion of secondary nitroalkanes to ketones and the use of primary nitroalkanes as acyl-anion equivalents in Michael reactions
作者:William T. Monte、Manuel M. Baizer、R. Daniel Little
DOI:10.1021/jo00154a009
日期:1983.3
KOFT E. R., J. ORG. CHEM., 52,(1987) N 15, 3466-3468
作者:KOFT E. R.
DOI:——
日期:——
Oxone® Promoted Nef Reaction. Simple Conversion of Nitro Group Into Carbonyl
Abstract A mild and convenient oxidative Nefreaction using Oxone® (potassium hydrogen persulfate) is described. Following our procedure primary and secondary nitroalkanes generate carboxylic acids and ketones, respectively, both in good yields. †Deceased on January 1st 1998