- Activation and Control of the Reaction of the Reaction of Dioxastannolane with Carbon Disulfide and Phenyl Isothiocyanate by the Addition of Bases
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1,3-Dioxa-2-stannolanes 1 are readily activated by Lewis bases such as Bu3P and Et3N to give cycloadducts on reaction with carbon disulfide or phenyl isothiocyanate under mild conditions.In particular, bases play a characteristic role in the reaction with
- Yano, Katsunori,Baba, Akio,Matsuda, Haruo
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p. 1881 - 1884
(2007/10/02)
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- Stereospecific Cycloaddition of Heterocumulenes to Oxiranes Catalyzed by Organotin Halide Complexes
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Stereospecific cycloaddition of 2,3-disubstituted oxiranes to heterocumulenes, including carbodiimides, isocyanates and carbon dioxide, is catalytically promoted by dialkyltin diiodide-hexamethylphosphoric triamide (HMPA) system, producing various five-membered heterocycles, where the configuration of the carbons in the oxirane ring is retained.In particular, the addition of isocyanates to oxiranes gave stereospecifically two types of products, dioxolan-2-imines and oxazolidin-2-ones independently, while the rearrangement of the former to the latter product has been already proposed.
- Baba, Akio,Seki, Kenji,Matsuda, Haruo
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p. 1925 - 1930
(2007/10/02)
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