Six aporphine and one phenanthrenoid alkaloids isolated from AROMADENDRON ELEGANS Blume were investigated for their inhibitory effect on platelet-activatin...
The synthesis of 3-vinyl-phenanthrene and 4-vinyl-1, 2-dihydro-phenanthrene is reported. High pressure Lewis acid-catalyzed cycloaddition reactions of both...
The complexes Ln(L) 3 (L = N-(2,6-di-isopropylphenyl)-phenanthren- o-iminoquinone, Ln = Sc ( 1), Yb ( 2)) were synthesized by the reactions of phenanthren-...
ChemInform is a weeklying Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInformple...
A total of 1,268 harbour porpoises were obtained from fishing nets in Icelandic coastal waters from September to June in the years 1991 to 1997. Foetal sex...
Four new phenanthrenoid dimers, effususins A–D (1–4), were isolated from an ethanolic extract of the medullae of Juncus effuses (Juncaceae). Their struct...
An expedite general synthesis of three angularly fused furophe-nantharquinones is described from 1-(2-furyl)-naphthalen-2-carbaldehyde derivatives. 1-(2-fu...
Sir: The quinoid nucleus embodies the potential of being a highly useful structural building block in organic syn- thesis. To date, the applications of quinones in com- plex natural products synthesis have centered around the Diels-Alder...
This contribution describes the biogenetic-type syntheses of some isoquinoline alkaloids and related compounds which, without duplicating our previous review ( 1), is based on papers published after 1970.
Total syntheses of (±)-desacetamidoisocolchicine (2b) and (±)-colchicine (1a) have been achieved. Key features of the synthetic sequence are the facile i...
Reaction of a variety of ketones with ethane-1,2-dithiol to form thioketals proceeds very efficiently and under mild conditions using magnesium or zinc tri...
The use of power sum symmetric functions leads to Newton's identities, which relate the traces of various powers of A, the adjacency matrix of a graph, and...
Treatment of per-O-acetylated mono- and di-saccharides with (alkyl/arylthio)tri-methylsilane and iodine at ambient temperature results in the formation of ...
The first total synthesis of (+)-frondosin A was accomplished in 19 longest linear and 21 total steps from commercially available materials. The key featur...
A new, convergent synthesis of 2-cyclopenten-1 -ones is reported. Treatment of dimethyl 2-oxopropylphosphonate (21) with excess triethyl orthoformate in th...
Syntheses and ring opening reactions of vicinally donor-acceptor-substituted cyclopropanes are treated in this review. Special attention is directed to met...
A range of carbonyl compounds including aliphatic and aromatic aldehydes and ketones were converted to the corresponding thioacetals in high yields in the ...
Phenylthiotrimethylsilylmethyl-lithium (4) reacts with alkyl halides to give 1-phenylthio-1-trimethyl-silylalkanes (5), which can also be prepared by the addition of alkyl-lithium to 1-phenylthio-1-trimethylsilylethene (8), or from bis (...
A four step, efficient and general methodology for the conversion of a cyclic ketone into the corresponding alpha-spiro-beta-methylene-gamma-butyrolactone,...
