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Your search keyword '"Ohsato, Hiroshi"' showing total 6 results
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6 results on '"Ohsato, Hiroshi"'

1. Novel intramolecular [4+1] and [4+2] annulation reactions employing cascade radical cyclizations

Author

Takasu, Kiyosei, Ohsato, Hiroshi, Kuroyanagi, Jun-ichi, and Ihara, Masataka

Subjects
Chemistry, Organic -- Research, Chemical reactions -- Analysis, Radicals (Chemistry) -- Physiological aspects, Ring formation (Chemistry) -- Physiological aspects, Iodides -- Physiological aspects, Silane -- Physiological aspects, Hydrogen -- Physiological aspects, Biological sciences, Chemistry
Abstract

Research has been conducted on the free radical cyclization reactions. Results indicate that tributylin hydride and tris(trimethylsilyl)silane are the promoters of the sequential or cascade free radical cyclization reactions of alkynes or dienoate tethered vinyliodides.

Published
2002

6. New stereoselective entry to azaspirocyclic nucleus of halichlorine and pinnaic acids by radical translocation/cyclization reaction.

Author

Takasu K, Ohsato H, and Ihara M

Subjects
Alkaloids chemistry, Cyclization, Free Radicals chemistry, Piperidines chemistry, Spiro Compounds chemistry, Stereoisomerism, Alkaloids chemical synthesis, Azo Compounds chemistry, Spiro Compounds chemical synthesis
Abstract

[reaction: see text] A stereoselective approach to the spirocyclic nucleus of halichlorine and pinnaic acids has been developed starting from a piperidine derivative. A key transformation in this sequence involves a cascade radical translocation/cyclization process.

Published
2003
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