β-Cyclodextrin/IBX in water: highly facile biomimetic one pot deprotection of THP/MOM/Ac/Ts ethers and concomitant oxidative cleavage of chalcone epoxides and oxidative dehydrogenation of alcohols
作者:Sumit Kumar、Naseem Ahmed
DOI:10.1039/c5gc01785h
日期:——
A mild and efficient one-pot deprotection of THP/MOM/Ac/Ts ethers and concomitant oxidative cleavage of epoxides and oxidative dehydrogenation of alcohols to form [small beta]-hydroxy 1, 2 diketones, 1, 2, 3 triketones...
对THP / MOM / Ac / Ts醚进行温和有效的一锅脱保护,并进行环氧化物的氧化裂解和醇的氧化脱氢反应,形成[小β-羟基1,2,2二酮,1,2,3三酮...
Oxidative Synthesis of α,β-Unsaturated Ketone from α-Iodo Ketone Using Peracid
Oxidation of α-iodo ketone in CH 2 Cl 2 using m-chloroperbenzoic acid yields α,β-unsaturatedketone by β-H elimination in good yield. This reaction affords a new and convenient synthetic method for α,β-unsaturatedketone from u-iodo ketone.
Synthesis of Cyclic Enones via Direct Palladium-Catalyzed Aerobic Dehydrogenation of Ketones
作者:Tianning Diao、Shannon S. Stahl
DOI:10.1021/ja206575j
日期:2011.9.21
carbonyl compounds are versatile intermediates in the synthesis of pharmaceuticals and biologically active compounds. Here, we report the discovery and application of Pd(DMSO)(2)(TFA)(2) as a catalyst for direct dehydrogenation of cyclohexanones and other cyclicketones to the corresponding enones, using O(2) as the oxidant. The substrate scope includes heterocyclic ketones and several natural-product
Iodine(V) Reagents in Organic Synthesis. Part 4. <i>o</i>-Iodoxybenzoic Acid as a Chemospecific Tool for Single Electron Transfer-Based Oxidation Processes
作者:K. C. Nicolaou、T. Montagnon、P. S. Baran、Y.-L. Zhong
DOI:10.1021/ja012127+
日期:2002.3.1
o-Iodoxybenzoic acid (IBX), a readily available hypervalent iodine(V) reagent, was found to be highly effective in carrying out oxidations adjacent to carbonyl functionalities (to form alpha,beta-unsaturated carbonyl compounds) and at benzylic and related carbon centers (to form conjugated aromatic carbonyl systems). Mechanistic investigations led to the conclusion that these new reactions are initiated
The Synthesis of 3-Substituted Tropilidenes by the Dehydration of 1-Substituted 2,6-CycloheptadienoIs. A New Unambiguous Route
作者:Ken’ichi Takeuchi、Takashi Maeda、Kunio Okamoto
DOI:10.1246/bcsj.50.2817
日期:1977.10
3-Alkyl-, 3-aryl-, and 3-deuteriotropilidenes are prepared in 21–29% yields by the dehydration of the corresponding 1-substituted 2,6-cycloheptadienols with boric acid. The present method provides an unambiguous route to the title compounds.