Abstract
The fully diethoxyphosphoryl(Dep)-protected polyamines 1b-3b were prepared from the corresponding polyamines with 'diethyl phosphite' (= diethyl phosphonate) and CCl4 in a solid base/organic liquid two-phase system in the presence of Bu4NBr as phase-transfer catalyst. Subsequent phase-transfer-catalyzed alkylation of phosphoramidates 1b-3b with bis(chloromethyl)arenes 5-8 in the presence of Bu4N(HSO4) followed by deprotection gave good yields of polyazacyclophanes 9a-16a.
Lingua originale | Inglese |
---|---|
pagine (da-a) | 793-800 |
Numero di pagine | 8 |
Rivista | Helvetica Chimica Acta |
Volume | 83 |
Numero di pubblicazione | 4 |
DOI | |
Stato di pubblicazione | Pubblicato - 2000 |
Pubblicato esternamente | Sì |