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1)  α-halo-α,β-unsaturated esters
α-卤代-α,β-不饱和酯
2)  α,β-unsaturated cyanoester
α,β-不饱和氰代酯
3)  γ-oxo-α,β-unsaturated esters
γ-氧代-α,β-不饱和酯
1.
The dissertation studied the regioseletive addition of several nucleophiles toγ-oxo-α,β-unsaturated esters.
γ-氧代-α,β-不饱和酯是一类多官能团的缺电子烯烃,本论文研究了几类亲核试剂对它的区域选择性加成反应。
4)  α,β-unsaturated esters
α,β-不饱和酯
1.
A reducing system,NaBH4-CuCl/CH3OH,was applied for the selective reduction of carbon-carbon double bond of α,β-unsaturated esters with high selectivity.
用NaBH4-CuCl/CH3OH体系高选择地还原了α,β-不饱和酯的碳碳双键,考察了还原剂NaBH4和CuCl的用量、溶剂、不同的卤化物等因素对反应的影响。
2.
Cyclopentenone derivatives and α,β-unsaturated esters are two sorts of extraordinary important compounds.
环戊烯酮衍生物和α,β-不饱和酯是两类非常重要的化合物。
5)  α,β-unsaturated ketones and esters
α,β-不饱和酮、酯
1.
Treatment of the polymer-supported α-phenylseleno ketones and esters prepared from polymer-supported selenium bromide with ketone and ester enolates with hydrogen peroxide afford α,β-unsaturated ketones and esters in good yields and high purities (>95%) without further purification.
酮或酯在-78℃经二异丙基胺基锂(LDA)作用形成相应的烯醇式氧负离子,烯醇式氧负离子再与聚苯乙烯负载硒溴反应得到聚苯乙烯负载α-硒基酮或酯;常温下将该负载型的α-硒基酮或酯用过量的30%双氧水处理制得相应的α,β-不饱和酮、酯。
6)  α,β-unsaturated ester
α,β-不饱和酯
1.
The reaction results in the direct carbon-carbon double bond formation from silyl ethers to give the corresponding α,β-unsaturated esters.
该反应使硅醚直接形成碳碳双键而得到α,β-不饱和酯。
补充资料:2α,17α-Diethinyl-A-nor-5α-androstane-2β,17β-diol
分子式:C22H30O2
分子量:326.48
CAS号:52-74-4

性质:产品为结晶化合物。

制备方法:可用3β-乙酰氧基雄甾-5-烯-17-酮经催化氢化、水解,生成3β-羟基雄甾烷-17-酮,然后以铬酸氧化开环(A)、环合得A-失碳雄甾烷-2,17-二酮,最后以乙炔炔化制得该品。

用途:双炔失碳丙酯的中间体。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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