منابع مشابه
41-Azido-41-deoxyrapamycin
The title compound, C(51)H(78)N(4)O(12), is a derivative of rapamycin, a triene macrolide anti-biotic mol-ecule isolated from Streptomyces hygroscopicus. The macrocyclic ring structure has 15 chiral centres, with one of the substituent hy-droxy groups giving an intra-molecular hydrogen bond to a ketone O-atom acceptor. The mol-ecules also form inter-molecular hy-droxy-ketone O-H⋯O hydrogen-bond...
متن کامل3α-Azido-5-cholestene
The crystal structure of the title compound, C(27)H(45)N(3), has been determined as part of our investigation into the hydro-phobic modification of amino-glycoside anti-biotics. The isopropyl group showed disorder for the tertiary carbon (equal occupancies), with high thermal motion for the peripheral atoms of the isopropyl and azide groups also apparent in the structure. The axial disposition ...
متن کامل1-Azido-N′-(phenylsulfonyl)methanimidamide
In the title compound, C(7)H(7)N(5)O(2)S, the aromatic ring is oriented at dihedral angles of 79.46 (2) and 89.17 (2)°, respectively, with respect to the amino-(azido)-methyl and the S(6) six-membered ring motif generated by an intra-molecular N-H⋯O inter-action [N⋯O = 2.8901 (15) Å]. Inter-molecular N-H⋯O hydrogen bonds [N⋯O = 2.9177 (15) and 2.9757 (15) Å] generate an infinite one-dimensional...
متن کامل6-Azido-6-deoxy-α-l-galactose (6-azido-l-fucose) monohydrate
Although 6-azido-6-de-oxy-l-galactose in aqueous solution is in equilibrium between the open-chain, furan-ose and pyran-ose forms, it crystallizes solely as 6-azido-6-de-oxy-α-l-galactopyran-ose monohydrate, C(6)H(11)N(3)O(5)·H(2)O, with the six-membered ring adopting a chair conformation. The structure exists as hydrogen-bonded chains, with each mol-ecule acting as a donor and acceptor of five...
متن کاملSolid-Phase Synthesis Utilizing Azido-α-Amino Acids: Reduction of Azido-Protected Proline
Introduction During an evaluation of azido-α-amino acids and their utility in solid-phase peptide chemistry, the octapeptide angiotensin II and a tripeptide thyrotropin-releasing hormone (TRH) analog have been prepared using Meldal’s procedure [1]. A necessary novel step was the reduction of the azido moiety of L-proline, a secondary amine constrained by a ring, to the corresponding free amine ...
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ژورنال
عنوان ژورنال: EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria
سال: 2017
ISSN: 0214-9001
DOI: 10.1387/ekaia.17857