A Convergent Synthesis of Hexahomotriazacalix[3]arene Macrocycles
摘要:
A new, convergent synthesis of hexahomotriazacalix[3] arenes la-e is described. The key transformation in this synthesis involves the coupling of the triamines 4a-d with 2,6-bis(chloromethyl)-4-methylphenol 5 and results in the formation of the hexahomotriazacalix[3] arenes 1a-d in 90-95% yield. The triamines 4a-d were constructed by the one-pot reaction of monochloroaldehyde 3 and a primary amine followed by reduction to yield the triamines 4a-d in 50-55% yield. Deallylation of macrocycle Id was accomplished by palladium catalysis to obtain the N-unsubstituted macrocycle le, which has the potential to be a precursor to a variety of N-substituted hexahomotriazacalix[3] arenes.
A Convergent Synthesis of Hexahomotriazacalix[3]arene Macrocycles
摘要:
A new, convergent synthesis of hexahomotriazacalix[3] arenes la-e is described. The key transformation in this synthesis involves the coupling of the triamines 4a-d with 2,6-bis(chloromethyl)-4-methylphenol 5 and results in the formation of the hexahomotriazacalix[3] arenes 1a-d in 90-95% yield. The triamines 4a-d were constructed by the one-pot reaction of monochloroaldehyde 3 and a primary amine followed by reduction to yield the triamines 4a-d in 50-55% yield. Deallylation of macrocycle Id was accomplished by palladium catalysis to obtain the N-unsubstituted macrocycle le, which has the potential to be a precursor to a variety of N-substituted hexahomotriazacalix[3] arenes.
A Convergent Synthesis of Hexahomotriazacalix[3]arene Macrocycles
作者:Panadda Chirakul、Philip D. Hampton、Zsolt Bencze
DOI:10.1021/jo001094y
日期:2000.12.1
A new, convergent synthesis of hexahomotriazacalix[3] arenes la-e is described. The key transformation in this synthesis involves the coupling of the triamines 4a-d with 2,6-bis(chloromethyl)-4-methylphenol 5 and results in the formation of the hexahomotriazacalix[3] arenes 1a-d in 90-95% yield. The triamines 4a-d were constructed by the one-pot reaction of monochloroaldehyde 3 and a primary amine followed by reduction to yield the triamines 4a-d in 50-55% yield. Deallylation of macrocycle Id was accomplished by palladium catalysis to obtain the N-unsubstituted macrocycle le, which has the potential to be a precursor to a variety of N-substituted hexahomotriazacalix[3] arenes.