Regioselective ring openings in the 3,5-dioxa-8-azabicyclo[5.2.0]nonane ring system
نویسندگان
چکیده
منابع مشابه
The preparation of stable aziridinium ions and their ring-openings.
The reaction of enantiomerically pure 2-substituted 1-phenylethyl-aziridine with methyl trifluoromethanesulfonate generated a stable methylaziridinium ion, which was reacted with various external nucleophiles, including nitrile, to yield synthetically valuable and optically pure acyclic amine derivatives in a completely regio- and stereoselective manner.
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The alarm system for the SPring-8 storage ring is described. The system watches status of equipment, gives a warning to operators when a trouble happens, records it and analyzes past troubles. The system is built on the database system using client/server scheme.
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tert-Butyl cinnamates are aziridinated with high trans-selectivity by an N-N ylide generated in situ from N-methylmorpholine and O-diphenylphosphinyl hydroxylamine. The resulting N-unfunctionalised aziridines are shown to be versatile synthetic building blocks that undergo highly selective ring-opening reactions with a wide range of nucleophiles.
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The SPring-8 storage ring is under construction and will be commissioned in February 1997. The design for the control system of the storage ring adopted the so-called Standard Model concept. VMEbus is used as the front-end control system and is widely distributed around the 1436m circumference of the storage ring. The VMEbus is controlled by a single-board-computer with a RISC processor. The VM...
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Stability of electron orbit is one of the most important properties to achieve brilliant photon beams for third generation synchrotron radiation sources. In the design of a SPring-8 storage ring, many ideas for orbit stabilization were thus considered. Consequently, without any correction, electron orbit stability of about 50 μm per day is obtained. Since a main part of the orbit movement is sl...
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ژورنال
عنوان ژورنال: Arkivoc
سال: 2007
ISSN: 1551-7012
DOI: 10.3998/ark.5550190.0009.302