α,ω-Diamino aliphatic ethers react under ambient conditions with dimethyl α,ω-dicarboxylates, in methanol as a solvent, to give the cyclic diamides in good yields, and their subsequent reduction with lithium aluminium hydride affords the respective diazacoronands.
Three 18-membered macrocyclic diamides with differing donor atoms and backbone substituents
作者:Gary L. N. Smith、Douglas R. Powell、Michelle D. Moser、Richard W. Taylor
DOI:10.1007/s10847-022-01133-6
日期:2022.6
intermolecular hydrogenbonds between an amide and carbonyl [N–H···O = 2.8206(11) Å and 2.8637(11) Å] and two intermolecular hydrogenbonds between an amide and ether [N–H···O = 2.9570(11) Å and 3.0067(11) Å]. There are two intramolecular hydrogenbonds between amide and ether oxygens [N–H···O = 2.589(3) Å and 2.623(4) Å] in II. Molecule III has a mixture of intramolecular hydrogenbonds between an amide
晶体结构报道为 1,4,10,13-tetraoxa-7,16-diazacyclooctadecane-6,17-dione, (C 12 H 22 N 2 O 6 ), ( I ), dibenzo[e,q][ 1,4,10,13,7,16] tetraoxadiazacyclooctadecine-6,13-dione, (C 20 H 22 N 2 O 6 ), ( II ) 和 1,4-dioxa-10,13-dithia-7,16 -二氮杂环十八烷-8,15-二酮,(C 12 H 22 N 2 O 4 S 2 ),( III )。固态结构对所有三种结构都显示出不同类型的氢键。在我, 酰胺和羰基之间有两个分子间氢键 [N–H···O = 2.8206(11) Å 和 2.8637(11) Å] 酰胺和醚之间有两个分子间氢键 [N–H··· O = 2.9570(11) Å 和
Monocyclic macrocyclic compounds and complexes thereof
申请人:Schering Corporation
公开号:US03966766A1
公开(公告)日:1976-06-29
Novel monocyclic macrocyclic compounds having nitrogen bridgehead atoms and having in the hydrocarbon bridging chains at least two additional hetero atoms selected from the group consisting of sulfur, oxygen, and nitrogen, when admixed with a compatible cation-donor compound form stable cation-containing macrocyclic complexes which, in turn, can be conveniently dissociated by addition of acid or a quaternizing agent. The novel macrocyclics are valuable for use in the same way and for the same purposes as chelating agents.
Alpha,omega-diamino aliphatic ethers react under ambient conditions with dimethyl alpha,omega-dicarboxylates, in methanol as a solvent, to give the cyclic diamides in good yields. Their subsequent reduction with a borhoydride-dimethyl sulphide complex affords the respective diazacoronands.