CASHEW NUT SHELL LIQUID. IV. ON THE HETEROGENEOUS NATURE OF THE MONOPHENOLIC FRACTION OF CASHEW NUT SHELL LIQUID. THE STRUCTURE OF THE MONO-OLEFINIC COMPONENT1
An efficient synthesis of substituted quinazolin-4(3H)-ones by a one-pot ligand-free CuI-catalyzed coupling/condensative cyclization under mild conditions is described. Our study provides an alternative strategy for the preparation of biologically active quinazolin-4(3H)-ones.
plays an important role in forming the presence of intramolecularhydrogen bonds. The chemical shift of the Naryl-H downfield changes obviously, due to the formation of intramolecularhydrogen bonds and the deshielding effect of oxygen, and the neighboring C–H is activated and shows downfield protonic signal too. The presence of intramolecularhydrogen bonds probably provides the explanation for the transformation
deoxyvasicinone analogues were obtained from 2-(4-oxopentyl)quinazolin-4(3H)-ones via different process of linear cyclizations. The first was 1-acetyl-2,3-dihydropyrrolo[2,1-b]quinazolin-9(1H)-one analogue derived from direct cyclization in the presence of I2 in basic condition. The other was 1-acetylpyrrolo[2,1-b]quinazolin-9(3H)-one analogue obtained from two-step procedures beginning with geminal
通过不同的线性环化过程,从 2-(4-oxopentyl)quinazolin-4(3 H )-ones中获得了两种 deoxyvasicinone 类似物。第一个是 1-acetyl-2,3-dihydropyrrolo[2,1- b ]quinazolin-9(1 H )-一种在碱性条件下在 I 2存在下直接环化衍生的类似物。另一种是 1-acetylpyrrolo[2,1- b ]quinazolin-9(3 H )-一种通过两步程序获得的类似物,首先在酸性条件下进行孪生二氯化,然后在对位存在的情况下形成分子内 C N 键甲苯磺酸。
CN116535344
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CASHEW NUT SHELL LIQUID. IV. ON THE HETEROGENEOUS NATURE OF THE MONOPHENOLIC FRACTION OF CASHEW NUT SHELL LIQUID. THE STRUCTURE OF THE MONO-OLEFINIC COMPONENT<sup>1</sup>