Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 1 (January 2012)

organic compounds

Acta Cryst. (2012). E68, o54-o55    [ doi:10.1107/S1600536811051543 ]

The desoxazoline asidiacyclamide analogue cyclo(Gly-Thr-D-Val-Thz-Ile-Thr-D-Val-Thz) acetonitrile monosolvate

A. Asano and M. Doi

Abstract: The title peptide [systematic name: 4-(butan-2-yl)-7,20-bis­(1-hy­droxy­eth­yl)-10,23-bis­(propan-2-yl)-12,25-dithia-3,6,9,16,19,22,27,28-octa­aza­tricyclo­[,14]octa­cosa-1(26),11(28),13,24(27)-tetra­ene-2,5,8,15,18,21-hexone acetonitrile monosolvate], C32H48N8O8S2·CH3CN, an analogue of ascidiacyclamide (ASC) [cyclo(-Ile-Oxz-D-Val-Thz-)2], lies about a twofold rotation axis, so that the glycine (Gly) and isoleucine (Ile) residues are each disordered over two sites with equal occupancies. The acetonitrile mol­ecule is also located on a twofold axis passing through the C and N atoms. In the peptide, the thia­zole rings are faced to each other with a dihedral angle of 9.63 (15)° and intra­molecular N-H...O and O-H...O hydrogen bonds are observed. A bifurcated N-H...(O,O) hydrogen bond links the peptide mol­ecules into a layer parallel to the ab plane.

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Supplementary materials

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[ doi:10.1107/S1600536811051543/is5015Isup3.mol ]
Supplementary material


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