Some results obtained in the utilisation of quinones as philodiene
作者:M. Lora-Tamayo
DOI:10.1016/0040-4020(58)88002-3
日期:1958.1
In the course of a study of new applications of the Diels-Alder reaction, the addition of p-benzoquinone and substitutedquinones to ethylene-aromatic dienes and heteroconjugations containing nitrogen, has been investigated.
Facile construction of 3-hydroxyphenanthrene-1,4-diones: key intermediates to tanshinone I and its A-ring-modified analogue
作者:Mingkun Jiao、Chunyong Ding、Ao Zhang
DOI:10.1016/j.tet.2014.03.019
日期:2014.5
key precursor for total synthesis of tanshinone I. This tandem process includes decarboxylative radicalalkylation, intramolecular C–H arylation and one-pot O-demethylation and aromatization. Variously substituted phenylpropanoic acids were well tolerated in this approach, and synthesis of tanshinone I (1) was finally successful in six straight steps in 19% overall yields from commercially available
Annoquinone-A, an antimicrobial and cytotoxic principle from Annona montana
作者:Tian-Shung Wu、Ting-Ting Jong、Hsien-Ju Tien、Chang-Sheng Kuoh、Hiroshi Furukawa、Kuo-Hsiung Lee
DOI:10.1016/s0031-9422(00)82257-8
日期:1987.1
new naturally occurring phenanthrene-1,4-quinone, annoquinone-A, along with parietin (physcion) and β-sitostenone were isolated from the stem bark of Annona montana . The structure of annoquinone-A was elucidated by spectral methods and synthesis. Annoquinone-A demonstrated potent antimicrobial activity against Bacillus subtilis and Micrococcus luteus as well as cytotoxicity in the KB ( ED 50 = 0.16
Parricide is an uncommon crime, so that many of the descriptive studies suffer from methodological shortcomings of small sample sizes and a non-representative ascertainment. We describe a consecutive series of mentally disordered offenders convicted of parricide who were admitted to high-security care and we compare their index characteristics with a group convicted of killing one or more strangers. The main findings were that the parricides were more likely to suffer from schizophrenia but less likely to have had a disrupted childhood and criminal history, as compared with those who had killed a stranger. Those in the parricide group had made a previous attack on their victim in 40% of cases. Overall, the study confirmed some of the differences that one might expect between these two groups of homicides, which had entirely different relationships to their victims.