A novel method for the synthesis of substituted naphthalenes and phenanthrenes
作者:Charles B. de Koning、Joseph P. Michael、Amanda L. Rousseau
DOI:10.1039/a908361h
日期:——
Heating of o-allyl-substituted acylbenzenes with potassium tert-butoxide in DMF with simultaneous irradiation from a high-pressure mercury lamp afforded substitutednaphthalenes, including arylnaphthalenes. 2-(o-Tolyl)-substituted aromatic aldehydes were converted into phenanthrenes under the same conditions. A formal synthesis of tanshinone I has also been achieved.
A novel synthesis of substituted 4-hydroxybenzo[c]pyran quinones
作者:Charles B. de Koning、Ivan R. Green、Joseph P. Michael、JoséR. Oliveira
DOI:10.1016/s0040-4039(97)01103-9
日期:1997.7
The synthesis of three benzopyran quinones containing hydroxy substituents at the 4-position has been achieved. The key step in each of these syntheses involved an oxidative mercury-mediated ring closure.
Synthesis of Some C‐4 Hydroxybenzo[<i>c</i>]pyrans: A New Approach
作者:Victor I. Hugo、Tebogo Masenya、Ivan R. Green
DOI:10.1080/00397910600592001
日期:2006.6.1
Abstract A new synthetic approach to the synthesis of some epimeric C‐4‐hydroxy‐benzo[c]pyrans is described. A key step in their formation is stereoisomerisation of a nonconjugated ortho alkenylphenylketone and ‐ester using palladium bisacetonitrile [bisacetonitriledichloropalladium(II)] to give the corresponding conjugated E stereoisomers which cyclize on treatment with meta‐chloroperbenzoic acid
The synthesis of isochroman-4-ols and isochroman-3-ols: models for naturally occurring benzo[g]isochromanols
作者:Charles B de Koning、Ivan R Green、Joseph P Michael、José R Oliveira
DOI:10.1016/s0040-4020(01)00963-2
日期:2001.11
The synthesis of isochromanes containing hydroxy substituents at the 4- and 3-positions has been achieved. The key step for the synthesis of the isochroman-4-ols entailed an oxidative mercury mediated ring closure of 2-(prop-1-enyl)phenylmethanol derivatives, while in the synthesis of the isochroman-3-ols the key step involved ozonolysis of 2-(prop-2-enyl)phenylmethanol derivatives. (C) 2001 Elsevier Science Ltd. All rights reserved.
Green, Ivan R.; Hugo, Victor I.; Oosthuisen, Francois J., South African Journal of Chemistry, 1994, vol. 48, # 1/2, p. 15 - 22
作者:Green, Ivan R.、Hugo, Victor I.、Oosthuisen, Francois J.、Eeden, Nestor van、Giles, Robin G. F.