In the molecule of the title compound, C(18)H(32)N(2)O(4), the central bicyclo-[3.3.0]octane (octa-hydro-penta-lene) has a rigid ring junction. Both rings of the bicyclo-[3.3.0]octane unit adopt an envelope conformation, and the flexible tert-butyl-carbamoyl side chains each have an extended conformation. Such a constrained bicyclo-[3.3.0]octane aliphatic template is of inter-est with respect t...

The asymmetric unit of the title compound, C(22)H(26)N(2)O, contains three crystallographically independent mol-ecules, in which the aromatic rings are oriented at dihedral angles of 21.74 (5), 27.59 (5) and 27.87 (5)°. Intra-molecular O-H⋯N hydrogen bonds result in the formation of planar six-membered rings, and these are nearly coplanar with the adjacent rings. In the crystal structure, π-π c...

The asymmetric unit of the title compound, C(26)H(28)BrN, contains two independent mol-ecules in which the carbazole rings are almost planar, with r.m.s. deviations of 0.0212 (1) and 0.0229 (1) Å. The dihedral angles between the carbazole ring system and the pendent benzene ring are 60.5 (1) and 56.3 (1)° in the two mol-ecules. In the crystal, mol-ecules are linked into chains along the b axis ...

The P atom in the title mol-ecule, C(10)H(23)ClN(3)O(2)P, has a distorted tetra-hedral coordination. In the C(O)NHP(O) unit, which has syn-oriented phosphoryl and N-H groups, the P-N bond of 1.703 (2) Å is longer and the O-P-N angle of 103.86 (7)° is contracted compared with the respective values in the two P(O)NHC(CH(3))(3) units [P-N = 1.632 (2) and 1.624 (2) Å; O-P-N = 116.80 (8) and 115.32 ...

In the title 2-propanol derivative, C(17)H(27)ClO(2), the two tert-butyl groups both have one methyl C atom lying in the plane of the aromatic ring. In the crystal, the phenol group forms a hydrogen bond to the hy-droxy O atom belonging to the alkyl substituent of an adjacent mol-ecule, forming a chain along the ac diagonal. The Cl atom is disordered over two positions in a 0.73 (4):0.27 (4) ra...

The level of inositol phosphates was measured in rat hepatocytes treated with 2-methyl-1,4-naphthoquinone (menadione) or tert-butyl hydroperoxide, which cause Ca2+ mobilization from intracellular stores and an increase in cytosolic free Ca2+ concentration. Although neither agent produced any apparent changes in the resting level of inositol phosphates, pretreatment of hepatocytes with either me...

The title compound, C(22)H(28)Br(2)O(2), crystallizes in a staggered arrangement to minimize the inter-actions of its ortho substituents, with a dihedral angle of 84.2 (3)° between the two aromatic rings. Short C-H⋯O hydrogen-bonding inter-actions between meth-oxy groups result in a one-dimensional polymeric chain of mol-ecules lying parallel to the b axis. One tert-butyl group is disordered eq...

In the crystal structure of the title compound, C(32)H(34)O(6), the mol-ecule is located on a twofold rotation axis. The two naphthyl fused-ring systems are aligned at 72.6 (1)°. Weak intermolecular C-H⋯O hydrogen bonding is present in the crystal structure.

In the title mol-ecule, C(16)H(25)NO(4), the non-H atoms, except for the two tert-butyl groups, are roughly planar (r.m.s. deviation of the non-H atoms = 0.086 Å). In the crystal, mol-ecules are linked into inversion dimers by pairs of N-H⋯O hydrogen bonds, forming R(2) (2)(10) ring motifs.

The title compound, C(15)H(28)O(4), was prepared by the condensation of pivalaldehyde with penta-erythritol. In the crystal, the two halves of the mol-ecule are related by a crystallographic twofold rotation axis passing through the central spiro-C atom. The two non-planar six-membered heterocycles both adopt chair conformations with the two tert-butyl groups both located in the equatorial posi...