Showing papers by "Masahiro Murakami published in 1989"
TL;DR: In this paper, the Michael reaction of α-isocyanoesters with α,β-unsaturated carbonyl compounds was efficiently promoted by a catalytic amount of tetrabutylammonium fluoride to produce α isocyano-δ-ketoesters or silyl ethers of their enols.
15 citations
TL;DR: The i.p. LD50 values of goniodomin A, a novel polyether macrolide, in male ICR mice were 1.2 and 0.7 mg/kg at 24 and 48 hr, respectively, and Histologically, perihepatitis, non-fatty vacuoles in the hepatocytes, central necrosis of the liver and massive necrosis in the cortical layer of the thymus were prominent.
14 citations
TL;DR: In this paper, a stepwise introduction of two different alkynyl groups onto the iminocarbon leading to the synthesis of unsymmetrical dialkynyl imines was achieved by palladium-catalyzed coupling reaction of N-phenyl phenylthioimidoyl chloride with alkynyltin compounds.
Abstract: A stepwise introduction of two different alkynyl groups onto the iminocarbon leading to the synthesis of unsymmetrical dialkynyl imines was achieved by palladium-catalyzed coupling reaction of N-phenyl phenylthioimidoyl chloride with alkynyltin compounds.
12 citations
TL;DR: In this article, a skeletal rearrangement of tetrasilanes in the palladium catalysed reaction with aryl isocyanides gives 3,3-disilyl-2,4-disila-1-azacyclobutane derivatives, the structure of which has been determined by X-ray crystallography.
Abstract: A novel skeletal rearrangement of tetrasilanes in the palladium catalysed reaction with aryl isocyanides gives 3,3-disilyl-2,4-disila-1-azacyclobutane derivatives, the structure of one example of which has been determined by X-ray crystallography.
12 citations
TL;DR: A polyunsaturated fatty acid isolated from a Pediastrum species was identified as (4 Z,7 Z,10 Z,13 Z )-hexadecatetraenoic acid as mentioned in this paper.
10 citations
TL;DR: In this article, the N-aryl aromatic imine was prepared by α-addition of organozinc to aryl isocyanide, coupled with aromatic iodide in the presence of a palladium or nickel catalyst.
Abstract: [1-(Arylimino)alkyl]zinc, prepared by α-addition of organozinc to aryl isocyanide, was coupled with aromatic iodide in the presence of palladium or nickel catalyst to give the corresponding N-aryl aromatic imine.
10 citations
TL;DR: In this article, the angiotensin converting enzyme inhibitory activities in water-soluble and fat-solvable fractions of sixteen species and strains of sixteen strains of microalgae were investigated.
Abstract: As part of the investigation on useful constituents in microalgae, we searched for angiotensin converting enzyme inhibitory activities in water-soluble and fat-soluble fractions of sixteen species and strains. Water-soluble fractions of eleven species and fat-soluble fractions of eight species showed inhibitory activities. In particular, the water-soluble fractions of the freshwater cyanophytesMicrocystis spp. showed inhibition at a concentration as low as 0.25 mg ml−1, and that of the halotolerant chlorophyteDunaliella bardawil showed moderate inhibition. The active principles were suggested to be low molecular peptides.
6 citations
TL;DR: In this article, a mixture of cyclobutadiene cobalt complexes has been determined by X-ray crystallography, and the structures of the structures have been determined using the properties of the dialkynylimines.
2 citations
TL;DR: Synthese des composes du titre par deshydratation de diformamido-1, 2 benzenes par le chloro acetate de trichloro-2, 2,2,2 ethyle en presence of triethylamine.
Abstract: Synthese des composes du titre par deshydratation de diformamido-1,2 benzenes par le chloro acetate de trichloro-2,2,2 ethyle en presence de triethylamine