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Synthesis and Structure of Chiral Cone Calix[4]arenes Functionalized at the Upper Rim with L-Alanine Units

✍ Scribed by Francesco Sansone; Silvia Barboso; Alessandro Casnati; Massimo Fabbi; Andrea Pochini; Franco Ugozzoli; Rocco Ungaro

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 694 KB
Volume: 1998
Category: Article
ISSN: 1434-193X
DOI: 10.1002/(sici)1099-0690(199805)1998:5<897::aid-ejoc897>3.0.co;2-k

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✦ Synopsis

Synthetic routes were developed to link L-alanine methyl ester or L-alanyl-L-alanine methyl ester at the upper rim of calix [4]arenes blocked in the cone conformation. Several tetra-(3 and 6) and difunctionalized (11 and 12) amino acids containing macrocycles were obtained. Reaction of these compounds with hydrazine gave the corresponding hydrazido derivatives 4, 13, and 14, while the hydrolysis of 3 with

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