In an article, published in an article, once mentioned the application of 1436-59-5, Name is cis-Cyclohexane-1,2-diamine,molecular formula is C6H14N2, is a conventional compound. this article was the specific content is as follows.SDS of cas: 1436-59-5
Bis(amino)allenylidene complexes by displacement of the MeO group in methoxy allenylidene complexes of chromium and tungsten. Synthesis, DFT calculations and solid-state structures of new bis(amino)allenylidene complexes
Pentacarbonyl dimethylamino(methoxy)allenylidene tungsten, [(CO) 5WCCC(OMe)NMe2] (1b), reacts with one equivalent of primary amines, H2NR, by selectively replacing the methoxy group to give dimethylamino(amino)allenylidene complexes, [(CO)5WCCC(NHR) NMe2]. When the amine is used in excess both terminal groups, OMe as well as NMe2, are replaced by the primary amino group giving [(CO)5WCCC(NHR)2 ]. The NHR substituent in these complexes may be modified by deprotonation with LDA followed by alkylation. The replacement of the methoxy group in 1b by a secondary amino group, NR 2, can be achieved by a stepwise process. Addition of Li[NR 2] to the Cgamma atom of 1b affords an alkynyl tungstate. Subsequent OMe- elimination induced by TMS-Cl/SiO 2 yields the allenylidene complexes [(CO)5WCCC(NR 2)NMe2]. When bidentate diamines are used instead of monoamines both substituents, OMe and NMe2, are replaced and allenylidene complexes are formed in which Cgamma constitutes part of a 5-, 6-, or 7-membered heterocycle. The reaction of [(CO) 5CrCCC(OMe)NMe2] (1a) with diethylene triamine affords an allenylidene complex with a heterocyclic endgroup carrying a dangling CH 2CH2NH2 substituent. All reactions follow a strict regioselective attack of the nucleophile at Cgamma and proceed with good to excellent yields. The addition of N-H to the C alphaCbeta bond is not observed. By applying either one of these routes nearly any substitution pattern in bis(amino)allenylidene complex can be realized.
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Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare