What Are the Structures of Fenestin A and Fenestin B? | Zendy

Schmidt Ulrich | Zendy; Lieberknecht Albrecht | Zendy; Kazmaier Uli | Zendy; Haslinger Ernst | Zendy

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What Are the Structures of Fenestin A and Fenestin B?

Author(s) -

Schmidt Ulrich,

Lieberknecht Albrecht,

Kazmaier Uli,

Haslinger Ernst

Publication year - 1990

Publication title -

angewandte chemie international edition in english

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 0570-0833

DOI - 10.1002/anie.199005141

Subject(s) - field (mathematics) , image (mathematics) , dimer , stereochemistry , chemistry , computer science , mathematics , artificial intelligence , pure mathematics , organic chemistry

1 H NMR signals at unusually high field (δ = 3.9–4.1 rather than 4.0–4.6 as in known cyclopeptides) render the proposed structures 1 and 2 unlikely for fenestin A and fenestin B, two cyclopeptides isolated from Pacific sponges. Synthesis and analysis of the postulated compound 2 as well as the dimer of 1 have made it possible to show that the suggested structure for fenestin B is wrong, while that for fenestin A must at least be regarded as questionable.

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