| A Simple Approach to the Synthesis of 2H-1-Benzopyrans and 3H-Naphtho[2,1-b] pyran Via Intramolecular Wittig Reactiont |
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| 作者姓名： | 曹卫国 张平生 陈米 沈嵘 丁维钰 |
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| 摘 要： | lintroductionThesetypesofcompoundsareofinterestbecauseoftheoccull.enceofthebenzopyranringsystemintheactiveconstituentsofseveralplantsusedasinsecticidesI]andnaturaldyesl'1.Previouspreparationshavebeedaccomplished(l)bytheintramolecularcyclizationofpheny]pr…
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| 收稿时间： | 27 September 1996 |
A simple approach to the synthesis of 2H-1-benzopyrans and 3H-naphtho[2,1-b] pyran via intramolecular wittig reactiont |
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| Weiguo Cao,Pingsheng Zhang,Mi Chen,Rong Shen,Weiyu Ding.A Simple Approach to the Synthesis of 2H-1-Benzopyrans and 3H-Naphtho[2,1-b] pyran Via Intramolecular Wittig Reactiont[J].Journal of Shanghai University(English Edition),1997,1(1):83-86. |
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| Authors: | Weiguo Cao Pingsheng Zhang Mi Chen Rong Shen Weiyu Ding |
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| Institution: | School of Chemistry and Chemical Engineering |
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| Abstract: | In the presence of K2CO3, 2-hydroxyethyltripheny phosphonium bromide (1) reacts with substituted salicylaldehyde (2) and 2-hydroxy-1 naphthaldehyde
(4) at 110 °C in a sealed tube. The title compounds were prepared in medium yield. The ratio of bromide (1) to aldehyde derivatives
was also discussed in this paper.
This work was partially supported by the National Natural Science Foundation of China |
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| Keywords: | phosphorane aldehyde bezopyran naphthopyran intramolecular Wittig reaction |
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