3,5-Dihydroxy-N′-[(2-hydroxy-1-naphthyl)methylene]benzohydrazide

6 - ( 1 , 3 - Dihydroxy - 3 - phenylpropylidene ) - 5 - hydroxy - 2 , 2 , 4 - trimethylcyclohex - 4 - ene - 1 , 3 - dione

A novel compound involved in the aroma of the fruit Campomanesia lineatifolia was isolated; the structure was determined by spectroscopic methods, mainly 1D and 2D NMR.

Synthesis of 1-Hydroxy-2-(Prop-2'-Enyl) 9-Antrone

An efficient synthesis of the 1-hydroxy-2-(prop-2'-enyl)9-anthrone is described. Selective nitration of anthraquinone, reduction to the corresponding amine, diazotization and treatment by sulfuric acid solution afforded the 1-hydroxy-9,10-anthraquinone in good yield as the key intermediate. Reaction with allyl bromide/K2CO3 and subsequent selective reduction accompanie...

(E)-N′-[(2-Hydroxy-1-naphthyl)methyl­ene]benzohydrazide monohydrate

In the title compound, C(18)H(14)N(2)O(2)·H(2)O, the dihedral angle between the benzene ring and the naphthalene system is 5.18 (10)°. Intra-molecular N-H⋯O hydrogen bonds influence the molecular conformation. In the crystal, inter-molecular N-H⋯O and O-H⋯O hydrogen bonds are observed as well as π-π inter-actions between the phenyl ring and the substituted ring of the naphthalene [centroid-cent...

N-Acetyl-2-hydroxy-N′-[methoxy(1-methylindol-2-yl)methyl]benzohydrazide

In the crystal structure of the title Schiff-base, C(20)H(21)N(3)O(4), the amino group forms an N-H⋯O hydrogen bond to the acetyl group of an adjacent mol-ecule, forming a zigzag chain. The 2-hydr-oxy group is inter-nally hydrogen bonded to the amido group though an O-H⋯O hydrogen bond.

Derivatives of N , N ' - bis [ 2 - hydroxy - 1 , 1 - bis ( hydroxymethyl ) ethyl ] ethanediamide