Detail of "10160-87-9"

Reference

Remote Stereochemical Control of Both Reacting Centers in Ketyl-Olefin Radical Cyclizations: Involvement of a Samarium Tridentate Ligate

Remote Stereochemical Control of Both Reacting Centers in Ketyl-Olefin Radical Cyclizations: Involvement of a Samarium Tridentate Ligate. Molander, Gary A.; McWilliams, J. Christopher; Noll, Bruce C. ( Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309-0215, USA). Journal of the American Chemical Society, 119(6), 1265-1276 (English) 1997 American Chemical Society. CODEN: JACSAT. ISSN: 0002-7863. DOCUMENT TYPE: Journal CA Section: 24 (Alicyclic Compounds) Section cross-reference(s): 28 High diastereoselection in a SmI2-promoted ketyl-olefin cyclization reaction is achieved using tartramide-derived keto allylic acetals as chiral auxiliaries.In this article, certain chemicals are used. Some of their cas registry numbers are 10160-87-9 and 183274-34-2 Thus, remote diastereoselection is achieved in a radical process; high levels of stereochem. induction are obsd. at both new stereocenters created in the transformation. Asym. induction may arise from a highly ordered, tricyclic transition structure made possible by three-point chelation between the ketyl intermediate and the samarium counterion. This transformation demonstrates the first use of a chelating metal to effect high levels of remote asym. induction in a radical reaction, providing consistently high ratios of cis/trans isomers. Enantiomerically enriched cyclopentanediols and -lactols are prepd. by this novel asym. cyclization protocol. .

Studies of the synthesis of diethyl acetal of propargylaldehyde

Studies of the synthesis of diethyl acetal of propargylaldehyde. Vasil'eva, R. L.; Ten, L. A. (Khim.-Metall. Inst., Karaganda, USSR). Izv. Akad. Nauk Kaz. SSR, Ser. Khim., (5), 80-3 (Russian) 1983. CODEN: IKAKAK. ISSN: 0002-3205. DOCUMENT TYPE: Journal CA Section: 23 (Aliphatic Compounds) ZnCl2 (but not CdCl2 or SnCl2) catalyzed the condensation reaction of AcOCMe2CYCH with HC(OEt)3 to give 20-25% AcOCMe2CYCCH(OEt)2, which was cleaved with KOH in Me3COH at 200° to give 45% HCYCCH(OEt)2.Except for chemicals metioned above, 10160-87-9 and 7646-85-7 are also used. .