Syntheses of bis- and tetra-crowned clefts and studies of their selectivities in metal ion complexation
作者:Richard A. Bartsch、Mark D. Eley、Alan P. Marchand、Rajesh Shukla、Kaipenchery A. Kumar、G. Madhusudhan Reddy
DOI:10.1016/0040-4020(96)00446-2
日期:1996.7
A novel “tetra[benzo(18-crown-6)]-crowned cleft” (2) and two new “bis[benzo(15-crown-5)]-crowned clefts” (3 and 4) have been synthesized. Their respective selectivities in (i) alkali metalpicrate extraction into chloroform and (ii) alkali metal perchlorate transport across bulk chloroform membranes have been determined relative to those of appropriate model compounds in each case. The observed picrate
Synthesis of formyl derivatives of benzocrown ethers containing N, S, and O heteroatoms in the macrocycle
作者:S. P. Gromov、O. A. Fedorova、A. I. Vedernikov、V. V. Samoshin、N. S. Zefirov、M. V. Alfimov
DOI:10.1007/bf00696971
日期:1995.1
A method for the synthesis of 4′-bromobenzodithia-15(18)-crown-5(6) and 4′-bromobenzodiaza-15 (18)-crown-5(6) by condensation of 3,4-di(2′-haloethoxy)bromobenzene with polyoxaalkanes containing terminal SH or NHMe groups was suggested. The method for the synthesis of formyl derivatives of benzocrowns containing N, S, and O heteroatoms in the macrocycle based on the metallation of appropriate bromo