Reference

Synthesis and binding studies of novel bisthiacalix[4]arenes with diimime linkages

Synthesis and binding studies of novel bisthiacalix[4]arenes with diimime linkages. Bhalla, Vandana; Kumar, Manoj; Katagiri, Hiroshi; Hattori, Tetsutaro; Miyano, Sotaro (Department of Environmental Studies, Graduate School of Environmental Studies, Tohoku University, Aramaki-Aoba 6-6-07, Aoba-ku, Sendai 980-8579, Japan). Tetrahedron Letters, Volume Date 2005, 46(1), 121-124 (English) 2004 Elsevier B.V. CODEN: TELEAY. ISSN: 0040-4039. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Section cross-reference(s): 29, 75 A series of novel bisthiacalix[4]arenes with diimine linkages of different arom. or heteroarom. dialdehydes have been synthesized. The condensation reaction of 1,4-benzenedicarboxaldehyde with syn,syn-26,28-bis(2-aminoethoxy)-5,11,17,23-tetrakis(1,1-dimethylethyl )-2,8,14,20-tetrathiacalix[4]arene-25,27-diol gave a bis(imine)-linked tetrathiacalix[4]arene deriv. (I). The structure of I was analyzed by X-ray crystallog. I and its congeners are able to quant. ext.There are some commonly used reagents with their cas registry numbers 833458-42-7 and 932-95-6 in this article. silver ion from aq. into org. phase under neutral conditions. .

Facile synthesis of a-polythienyls via 1,4-diketones

Facile synthesis of a-polythienyls via 1,4-diketones.Some chemicals with cas registry numbers like 932-95-6 are also used. Luo, Tung Mei H.; LeGoff, Eugene (Chia Nan Jr. Coll. Pharm., Tainan 71710, Taiwan). J. Chin. Chem. Soc. (Taipei), 39(4), 325-32 (English) 1992. CODEN: JCCTAC. ISSN: 0009-4536. DOCUMENT TYPE: Journal CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Section cross-reference(s): 35 Unsubstituted and substituted linear polythienyls including thiophenes in both even and odd nos. are conveniently prepd.Some chemicals with cas registry numbers like 932-95-6 are also used. from the Michael addn. of thiophenecarboxaldehydes to Mannich bases and the vinyl sulfone. Cyclization of the resulting 1,4-diones, e.g., I (m = 1, 2, 3, n = 2; m = 3, n = 2), with Lawesson's reagent gives a-polythienyls II in 53-94% yield.. ..