Acid-catalyzed reaction of 2-hydroxycyclobutanone with benzylic alcohols
作者:Alberto Martis、Alberto Luridiana、Angelo Frongia、Massimiliano Arca、Giorgia Sarais、David J. Aitken、Regis Guillot、Francesco Secci
DOI:10.1039/c7ob02545a
日期:——
The acid-promoted syntheses of 2-(benzyloxy)cyclobutanones and bis(benzyloxy)dioxatricyclo decanes were achieved starting from 2-hydroxycyclobutanone and variously functionalized benzyl alcohols. The reaction sequences afforded the desired products in good to high yields and in a solvent-dependent chemoselective fashion.
Sequential radical cyclization, alkoxy-radical fragmentation, and recyclization processes: a novel method for the synthesis of fused cycloheptanones and cyclooctenones from cyclohexanones
Preparation de composes bicycliques et d'heterocyclesazote ou oxygene bicycliques possedant une fonction cetone, enone ou alcool, a partir de cetones acetyleniques
制备 de composes bicycliques et d'heterocycles azote ouoxye bicycliques possedant une fonction cetone, enone ou alcool, a partir de cetones acetyleniques
Chemistry of α-nitroepoxides : Synthesis of useful intermediates via nucleophilic ring opening of α-nitroepoxides
作者:Yashwant D. Vankar、Kavita Shah、Anita Bawa、Surendra P. Singh
DOI:10.1016/s0040-4020(01)81002-4
日期:1991.10
Various α-nitroepoxides are converted into corresponding 1,2-diketones via two different ways of ring opening viz. with Pd(O) and with DMSO/BF3·Et2O(or ClSiMe3). In addition to this, a variety of nucleophiles are reacted with α-nitrocyclopentene oxide 6 and α-nitro-cyclohexene oxide 7 to form the corresponding α-substituted ketones which are useful intermediates in organic synthesis. Two of the products
Michael Addition Initiated Carbocyclization Sequences with Nitroolefins for the Stereoselective Synthesis of Functionalized Heterocyclic and Carbocyclic Systems
The synthesis of various heterocycles and carbocycles (tetrahydrofurans, pyrrolidines, cyclopentanes) has been achieved by using new and efficient ionic addition/cyclization sequences. Nitroolefins play an important role in the Michael addition induced ring‐closing reactions (MIRC) reported in the present article, with various substituted alcohols, amines, Grignard reactants, or malonate derivatives
Intramolecular Pauson–Khandreaction of various alkynyl exo-alkylidene-cyclohexanes and -pentane gives angular type 6–5–5 and 5–5–5 tricyclic compounds in good to high yield. The present reaction also offers convenient construction of two contiguous quaternary centers, which could not be synthesized from alkynyl endo-cycloolefins. Scope and limitation of the present reaction of various exo- and endo-cyclic