Detail of "18226-42-1"

Reference

Macrocyclic sulfide synthesis: trithia[nn+1,2n+4][2n + 1]metacyclophanes

Macrocyclic sulfide synthesis: trithia[nn+1,2n+4][2n + 1]metacyclophanes. Ricci, Alfredo; Danieli, Roberto; Rossini, Sandra (Ist. Chim. Org., Univ. Firenze, Florence, Italy). J. Chem. Soc., Perkin Trans. 1, (16), 1691-3 (English) 1976. CODEN: JCPRB4. DOCUMENT TYPE: Journal CA Section: 26 (Condensed Aromatic Compounds) Section cross-reference(s): 28 Cyclocondensation of the trisodium salt of a tris(mercaptoalkyl)benzene with a tris(bromoalkyl)methane gave trithiametacyclophanes. E.g. 18226-42-1 and 39597-87-0 which are cas registry numbers of substances are two of reagents here., 1,3,5-tris(mercaptomethyl)benzene, prepd. from 1,3,5-tris(bromomethyl)benzene and thiourea, with tris(3-bromopropyl)methane in C6H6-EtOH-NaOH-Me3COH for 21 hr gave 44% 2,10,19-trithia[56,14][11]metacyclophane (I). .

Efficient Synthesis and Host-Guest Properties of a New Class of Calix[6]azacryptands

All Rights Reserved. Efficient Synthesis and Host-Guest Properties of a New Class of Calix[6]azacryptands. Le Gac, Stephane; Zeng, Xianshun; Girardot, Camille; Jabin, Ivan ( Service de Chimie Organique, Universite Libre de Bruxelles, Brussels B-1050, Belg.). Journal of Organic Chemistry, 71(24), 9233-9236 (English) 2006 American Chemical Society. CODEN: JOCEAH. ISSN: 0022-3263. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Two members of a new class of calix[6]azacryptands, namely, calix[6]tampo and calix[6]tamb, have been synthesized through an efficient [1 + 1] macrocyclization reaction-redn. sequence with 1,3,5-(2-OCHC6H4OCH2)3C6H3 and 1,3,5-(2-OCHC6H4CH2)3C6H3. One of them has been obtained in a remarkably high overall yield from the known X6H3Me3.Several substances with their cas registry numbers 18226-42-1 and 918138-14-4 may be metioned in this study. In comparison to all the other calix[6]azacryptands, they possess unique conformational properties since they present a rigidified cone conformation with a partial filling of the cavity by the methoxy groups. In contrast to calix[6]tampo, the fully protonated deriv. of calix[6]tamb behaves as a remarkable mol. receptor toward polar neutral guests. NMR studies have shown that the intracavity binding process is governed by a conformational flip of the arom. walls of the calixarene core. .