Mainly engaged in: Hydrogen-imide hydrochloride, o-chlorophenyl cyclopentanone, 3.4 dimethoxy ethyl benzene, butyn single potassium acid, potassium ethyl malonyl, Ding amide, amide isobutyraldehyde , allyl chloroacetate, isopropyl chloroacetate Benzyl aluminum, cyclopentene, cyanide-o-chlorophenyl, o-methyl chloride, sulfuric acid chloride, p-chlorophenol, imidazole, Pinacolone, one chlorine Pinacolone.

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In this thesis, we describe a facile and economical synthesis of-abscisic acid from keto-isophorone and 3-butyn-2-ol through ketalization, oxidization, Witting-Horner reaction, reduction with chromium sulfate and other steps in 13% total yields. Compared to the previous routes, the starting materials are more commercially available and cheaper and the synthetic process is more easily controlled in our method, but the yield of this route is still to be improved.As to isostere principle, cyclopropyl and methyl vinyl are a couple of isostere.

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The normally brominated Baylis-Hillman adducts were formed as the major product at low temperature. While at room temperature or heating, the α,γand β,β-dibrominated compounds were formed as the major products using 3-butyn-2-one and methyl propiolate or propynenitrile as substrate, respectively.

貧電子炔類化合物的Baylis-Hillman反應(yīng)的研究在這部分工作中我們發(fā)現(xiàn)在用TiBr〓或BBr〓為L(zhǎng)ewis酸催化貧電子炔類化合物和芳香醛的Baylis-Hillman反應(yīng)時(shí)四川三级自中文字幕亚洲，溫度對(duì)反應(yīng)的影響很大：當(dāng)反應(yīng)在低溫下進(jìn)行時(shí)黄片黄片黄片，通常生成的是正常的β-溴代的Baylis-Hillman反應(yīng)產(chǎn)物；而在室溫或加熱條件下反應(yīng)外国A级片，以丁炔酮為底物時(shí)谁有黄色网站视频看，主要生成的是α，γ-二溴化合物亚洲欧美导航，而以丙炔酸甲酯及丙炔腈為底物時(shí)户外露出网站，主要生成的是β，β-二溴化合物欧美日韩一区视频。

Using 1,4-dibromobenzene,1,3,5-tribromobenzene and 2-methyl-3-butyn-2-ol as starting materials and PdCl2,triphenylphosphine,CuI and KOH as catalysts,1-bromo-4-ethynylbenzene,1,4-diethynylbenzene and 1,3,5-triethynylbenzene were synthesized by Sonogashina coupling reaction and elimination reaction.

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