Résumé/Abstract The di (amide)-diphosphane hybrids 5, 11, 17, 23-tetra-tert-butyl-25, 27- bis (diethylcarbamoylmethoxy)-26, 28-bis (diphenylphosphinomethoxy) calix [4] arene (cone) 7 and (R, R)-(+)-5, 11, 17, 23-tetra-tert-butyl-25, 27-bis [(1-phenylethyl) carbamoylmethoxy]-26, 28-bis (diphenylphosphinomethoxy) calix [4] arene (cone) 8 were prepared in three steps from p-tert-butylcalix [4] arene 1. Reaction of 1 with 1.1 equiv K 2 ...
[Riches, Samantha L.; Saha, Chandreyee; Filgueira, Noelia Fontan; Grange, Emma; McGarrigle, Eoghan M.; Aggarwal, Varinder K. Journal of the American Chemical Society, 2010 , vol. 132, # 22 p. 7626 - 7630]