Search

The title compound, C25H29NO3, was prepared in the course of the generation of depsipeptide libraries resembling the Jasplakinolide family of natural products. The dihedral angle between the phenyl ring planes is 74.1 (3)° The oxazolidinone ring adopts a slightly distorted 4 E conformation with an axial projection of the isopropyl substituent, which is easily rationalized by pseudo-allylic strain exerted by the exocyclic imide carbonyl. The two carbonyl groups adopt a noncolinear S-shaped conformation. [ABSTRACT FROM AUTHOR]

The molecule of the title compound, C20H34O4, is centrosymmetric. In the crystal structure, a network of O—H...O hydrogen bonds result in each molecule being linked to four neighbouring molecules and a two-dimensional net is formed. [ABSTRACT FROM AUTHOR]

The title compound, C20H27NO4, is a synthetic inter­mediate towards the preparation of novel furan­omycin derivatives. Its structure is consistent with the assumed anti selectivity of the allenylation step. [ABSTRACT FROM AUTHOR]

The title compound, C17H32N4, contains two piperazine heterocycles, which are methyl­ene bridged. The rings have chair conformations, with all substituents equatorial. [ABSTRACT FROM AUTHOR]

In the title compound, C14H30O4Si, the bond angles around Si are in the range 105.4 (3)–112.1 (4)° and the tetra­hydro­furan ring adopts a distorted envelope conformation. There is one intra­molecular and one inter­molecular O—H⋯O hydrogen bond in the crystal structure. A spiral of mol­ecules forms around the 41 axis ( c axis) of the crystal structure via the inter­molecular O—H⋯O hydrogen bond. [ABSTRACT FROM AUTHOR]

In the title compound, C40H32N2O2P2, used as a nixantphos-type ligand in homogeneous catalysis, the central phenoxazine ring system deviates markedly from planarity, the dihedral angle between the two halves being 38.14 (3)°. The intra­molecular P⋯P distance is 4.2400 (7) Å. [ABSTRACT FROM AUTHOR]

The title compound, C42H41NOP2Si, used as a nixantphos-type ligand in homogeneous catalysis, crystallizes with one mol­ecule in the asymmetric unit. The mol­ecule has nearly mirror symmetry with N, O and Si on the pseudo-mirror plane, but it is not located on a crystallographic mirror plane. The most important feature of the mol­ecule is the intra­molecular P—P distance of 4.1453 (12) Å. The bond angles involving the P atoms are in the range 100.32 (14)–103.04 (15)°. [ABSTRACT FROM AUTHOR]

In the crystal structure of the title compound, (4a R,5 R,6 S,7 S,8a S)-methyl 8a-ethenylocta­hydro-5-acet­oxy-7-{[2-(acetoxy­meth­yl)-1-oxo-2-propen­yl]­oxy}-α,4-bis­(methyl­ene)-3-oxo-1 H-2-benzopyran-6-acetate, C24H28O10, the mol­ecule has a cis configuration at the junction of the two six-membered rings and not a trans configuration as was assigned on the basis of NMR data in solution [Asaka et al. (1977). Phytochemistry, 16, 1838–1839]. [ABSTRACT FROM AUTHOR]