Cu(II)-catalyzed highly enantioselective intramolecular cyclization of N-alkenylureas was developed for the concise assembly of chiral vicinal diamino bicyclic heterocycles. Facile removal of carbonyl group of the carbamido moiety allowed for ready access to enantioenriched cyclic vicinal diamines.
The use of bisphthalonitriles in the synthesis of side-strapped 1,11,15,25-tetrasubstituted phthalocyanines
作者:Clifford C. Leznoff、David M. Drew
DOI:10.1139/v96-035
日期:1996.3.1
25-tetrasubstituted phthalocyanines as pure compounds when treated with lithium octoxide in 1-octanol at 196 °C. A host of nine other bisphthalonitriles including 1,5-bis(2′,3′-dicyanophenoxy)-3-oxapentane, 1,1-bis(2′,3′-dicyanophenoxymethyl)cyclohexane, 1,2-bis(2′,3′-dicyanophenoxymethyl)benzene, and 2,5-bis(2′,3′-dicyanophenoxymethyl)furan did not dimerize to mononuclear phthalocynaines. The "gem dimethyl"
Synthese und pharmokologische Untersuchung offener und cyclischer Äthylendiamide. 1. Mitteilung über heterocyclische Siebenringe
作者:J. Büchi、A. Aebi、R. Bosshardt、E. Eichenberger
DOI:10.1002/hlca.19560390339
日期:——
Es wurde die Darstellung einiger 1, 4-Diaza-cycloheptan-5,7-dione undN, N′-Di-dialkylacetyl-äthylendiamine sowie ihre Nebenreaktionen beschrieben. Die Siebenring- Strukturder 1,4-Diaza-cycloheptan-5,7-dione wurde bewiesen. Die hergestellten Verbindungen zeigen praktisch keine sedative und analytische Wirkung.
Es wurde死于Darstellung einiger 1,4-Diaza-cycloheptan-5,7-dione and N,N'-Di-dialkylacetyl-äthylendiaminesone,而Nebenreaktionen beschrieben。Die Siebenring-Struktur der 1,4-Diaza-cycloheptan-5,7-dione wurde bewiesen。死于镇静和分析。
A two-step mimic for direct, asymmetric bromonium- and chloronium-induced polyene cyclizations
作者:Scott A. Snyder、Daniel S. Treitler、Andreas Schall
DOI:10.1016/j.tet.2010.03.037
日期:2010.6
Although direct, asymmetric, halonium-induced cyclizations have proven difficult to achieve in the absence of enzymes, this report provides a two-step alternative based on reacting polyenes with chiral mercury(II) complexes to afford a number of polycyclic organomercurials that can be subsequently converted, with retention, into their corresponding chlorine, bromine, and iodine derivatives in good
Synthesis of a tetraamido macrocycle ligand from a novel diamidodiol
申请人:The Clorox Company
公开号:US06384279B1
公开(公告)日:2002-05-07
A new composition of matter for a diamidodiol and a method for preparing the diamidodiol. The exemplary diamidodiol has the formula C15H30N2O4 and is prepared by reacting a first quantity of 2-amino-2-methyl-1-propanol with a second quantity of a di-substituted malonyl dichloride (i.e., diethylmalonyl dichloride), preferably in ethyl acetate as solvent. A tetraamido macrocycle is prepared from the diamidodiol in two steps by oxidizing the diamidodiol to form a diacid followed by coupling using a known procedure of the diacid with an aryl diamine (e.g., 1,2-diaminobenzene) to yield the tetraamido macrocycle.