An unusual decarboxylative benzannulation and biaryl formation during copper(I)-promoted halogen atom transfer radical cyclization of 2-allylaryl trichloroacetates
作者:Ram N. Ram、Ram K. Tittal、Shailesh Upreti
DOI:10.1016/j.tetlet.2007.09.058
日期:2007.11
CuCl/bpy-promoted halogenatomtransfer radical cyclization of 2-allylaryl trichloroacetates in refluxing benzene gave benzannulated chloroarenes and benzannulated symmetrical biaryls along with reductive dehalogenation products. The unusual decarboxylative benzannulation and biaryl formation might be explained by a further intramolecular radical addition on the benzene ring of the eight-membered lactone
Bis(1-methoxynaphthalene-8-C,O)palladium(II). A reactive palladocyclic compound with labile O to Pd donor bonds
作者:Houssa�ne Ossor、Michel Pfeffer
DOI:10.1039/c39850001540
日期:——
Bis(1-methoxynaphthanene-8-C,O)palladium(II) reacts stoicheiometrically with both nucleophiles and electrophiles to afford organic compounds viaselective carbon–carbon bond formation.
作者:J. Dehand、A. Mauro、H. Ossor、M. Pfeffer、R.H. de A. Santos、J.R. Lechat
DOI:10.1016/0022-328x(83)85076-1
日期:1983.7
insoluble material. This compound reacts with PdCl2(SEt2)2 to give bis(1-methoxynaphthalene-8-C,O)palladium(II) (I)_and with PtCl2(SEt2)2 to give cis- and trans-(1-methoxynaphthalene-8-C,O)(1-methoxynaphthalene-8-C)(diethylsulfide)platinum(II) (II), which are non-rigid molecules in solution. With the cyclopalladated dimers [)Cl2}2], MXNLi gives the palladobicyclic compounds: () (III). An X-ray diffraction
Two cyclic diphosphines, 1 and 2, have been prepared which show a remarkable stability against oxidation. This result is discussed on the basis of their rigid conformation, directing the lone pairs of the P-atoms towards the center of the cycle.
Resolution of 8′-alkoxy- and hydroxy-1,1′-binaphthalen-8-ols
作者:Duy H. Hua、Trieu X.C. Nguyen、James W. McGill、Yi Chen、Paul D. Robinson
DOI:10.1016/s0957-4166(01)00361-5
日期:2001.8
Enantiopure 8 ' -ethoxy-, 8 ' -hydroxy-, and 8 ' -methoxy-1,1 ' -binaphthalen-8-ol were readily resolved by separating the corresponding chiral camphanic esters [derived from the esterification of the alcohols with (-)-(1S)-camphanie chloride] based upon their differing solubility in diethyl ether and their differing chromatographic behavior. (C) 2001 Elsevier Science Ltd. All rights reserved.