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Огромнейшая просьба сделать СФ-сёрч по ключ. словам:
Сhiral Grignard Reagents
+++СФ_и/или_Re@_по key words
+++СФ_и/или_Re@_по key words
Последний раз редактировалось mercaptan Ср мар 13, 2013 12:36 am, всего редактировалось 3 раза.
Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say that stupidity is far more abundant than hydrogen, and THAT is the basic building block of the universe.
-- Frank Zappa
-- Frank Zappa
Re: СФ_по_key words
Может быть в реаксисе что-то найдется по этим ключ. словам...
хотя б за последние 10-15 лет...
хотя б за последние 10-15 лет...
Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say that stupidity is far more abundant than hydrogen, and THAT is the basic building block of the universe.
-- Frank Zappa
-- Frank Zappa
Re: СФ_и/или_Re@_по_key words
в реаксисе
для *hiral AND Grignard AND Reagent*
ничего нет
для reagent* AND Grignard
4740 citations out of 169022 reactions and 102029 substances
для *hiral AND Grignard
730 citations out of 44335 reactions and 22062 substances
первые 50 ссылок в приложении
для Сhiral Reagent* одна ссылка
Tetrahedron: Asymmetry 1998 , vol. 9, № 5 pp. 835-850
Title/Abstract
Enantioselective synthesis of tacrine-huperzine A hybrids. Preparative chiral MPLC separation of their racemic mixtures and absolute configuration assignments by X-ray diffraction analysis
A new synthesis of racemic 7-substituted bicyclo<3.3.1>non-6-en-3-ones, rac-4, whose key-step involves the reaction of a vinyl triflate, rac-7, with an oraganometallic reagent, has been developed.This proceedure has been applied to the enantioselective synthesis of (+)- and (-)-7-ethylbicyclo<3.3.1>non-6-en-3-one, (+)- and (-)-4b, from which both enantiomers of the cholinesterase inhibitor, tarcine-huperzine A hybrid, 9b, have been obtained.Rac-9b and its related compounds rac-9a and rac-10a were separated into their enantiomers on a preparative scale by medium pressure liquid chromatography (MPLC) using microcrystalline cellulose triacetate as the hiral stationary phase.X-ray diffraction analysis of (-)-10a as the o-iodobenzoic acid salt, allowed us to establish its absolute configuration and deduce those of other enantiopure tarcine-huperzine A hybrids.
для *hiral AND Grignard AND Reagent*
ничего нет
для reagent* AND Grignard
4740 citations out of 169022 reactions and 102029 substances
для *hiral AND Grignard
730 citations out of 44335 reactions and 22062 substances
первые 50 ссылок в приложении
для Сhiral Reagent* одна ссылка
Tetrahedron: Asymmetry 1998 , vol. 9, № 5 pp. 835-850
Title/Abstract
Enantioselective synthesis of tacrine-huperzine A hybrids. Preparative chiral MPLC separation of their racemic mixtures and absolute configuration assignments by X-ray diffraction analysis
A new synthesis of racemic 7-substituted bicyclo<3.3.1>non-6-en-3-ones, rac-4, whose key-step involves the reaction of a vinyl triflate, rac-7, with an oraganometallic reagent, has been developed.This proceedure has been applied to the enantioselective synthesis of (+)- and (-)-7-ethylbicyclo<3.3.1>non-6-en-3-one, (+)- and (-)-4b, from which both enantiomers of the cholinesterase inhibitor, tarcine-huperzine A hybrid, 9b, have been obtained.Rac-9b and its related compounds rac-9a and rac-10a were separated into their enantiomers on a preparative scale by medium pressure liquid chromatography (MPLC) using microcrystalline cellulose triacetate as the hiral stationary phase.X-ray diffraction analysis of (-)-10a as the o-iodobenzoic acid salt, allowed us to establish its absolute configuration and deduce those of other enantiopure tarcine-huperzine A hybrids.
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Re: СФ_и/или_Re@_по_key words
Да уж, не густо 
Может опечатка в запросе ... ---> *Chiral AND Grignard AND Reagent*mishka писал(а):в реаксисе
для *hiral AND Grignard AND Reagent*
ничего нет
Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say that stupidity is far more abundant than hydrogen, and THAT is the basic building block of the universe.
-- Frank Zappa
-- Frank Zappa
Re: СФ_и/или_Re@_по_key words
Может по структурам что-то интересное найдется:
Вместо хлора подойдет тж. Br/I.
Ch1
Ch2
Вместо хлора подойдет тж. Br/I.
Ch1
Код: Выделить всё
[H][C@]©(CC)[Mg]ClКод: Выделить всё
[H][C@@]©(CC)[Mg]ClУ вас нет необходимых прав для просмотра вложений в этом сообщении.
Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say that stupidity is far more abundant than hydrogen, and THAT is the basic building block of the universe.
-- Frank Zappa
-- Frank Zappa
Re: СФ_и/или_Re@_по_key words
А нафига в "Chiral" первая буква русская?
У вас нет необходимых прав для просмотра вложений в этом сообщении.
Re: СФ_и/или_Re@_по_key words
tipoIvan110 писал(а):А нафига в "Chiral" первая буква русская?
только собирался Вам написать, но уже и не надоIvan110 писал(а):attachment
Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say that stupidity is far more abundant than hydrogen, and THAT is the basic building block of the universe.
-- Frank Zappa
-- Frank Zappa
Re: +++СФ(+++)_Re@_ еще актуален ;)
Какой поиск конкретно в реаксисе интересует?
Re: +++СФ(+++)_Re@_ еще актуален ;)
Ch1/Ch2 (см. выше).
Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say that stupidity is far more abundant than hydrogen, and THAT is the basic building block of the universe.
-- Frank Zappa
-- Frank Zappa
Re: +++СФ(+++)_Re@_ еще актуален ;)
субстр. поиск
У вас нет необходимых прав для просмотра вложений в этом сообщении.
Re: +++СФ(+++)_Re@_ еще актуален ;)
Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say that stupidity is far more abundant than hydrogen, and THAT is the basic building block of the universe.
-- Frank Zappa
-- Frank Zappa
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