USE OF THIENO[2,3-B]THIOPHENE IN SYNTHESIS OF HETEROHELICENES BY DOUBLE PHOTOCYCLIZATIONS
USE OF THIENO[2,3-B]THIOPHENE IN SYNTHESIS OF HETEROHELICENES BY DOUBLE PHOTOCYCLIZATIONS
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DOI：
10.1021/ja00792a037
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发表时间：
1973-01-01
影响因子：
15
通讯作者：
WYNBERG, H
中科院分区：
文献类型：
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作者：
DOPPER, JH;OUDMAN, D;WYNBERG, H
合成了5种新的杂六螺旋烯。介绍了杂螺旋烯合成中的两个新元素：(a)双光环化和(b)使用噻吩[2,3 -6]噻吩(4)作为螺旋烯的构建块。在其中一个螺旋烯(6)的核磁共振谱中观察到“穿越空间耦合”。讨论了含噻吩部分的螺旋烯的不同寻常的光谱特性。
Five new heterohexahelicenes were prepared. Two new elements in heterohelicene synthesis have been introduced:(a) double photocyclizations and (b) the use of thieno [2, 3-6] thiophene (4) as a building block for helicenes. In the nmr spectrum of one of the helicenes (6)“through-space coupling" is observed. The unusual spectral properties of helicenes containing the thiophthene moiety are discussed.