CAS: 1573-17-7; But-2-Yne-1,4-Diyl Diacetate

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📜2,3-Dibromo-2(E)-Butenylene Diacetate置于1,2-双(二苯基膦)乙烷氯化镍,三正丁基氢锡体系中,用 四氢呋喃 用作溶剂,化学反应 0.5H,以100%的收率获得1,4-二乙酰氧基-2-丁炔
参考文献:镍催化剂活化碳-卤素键:由1,2-二卤化物合成烯烃
标题:镍催化剂活化碳-卤素键:由1,2-二卤化物合成烯烃
摘要:在室温下,在催化量的二苯基膦基乙烷二氯化镍(nidppecl 2)和氢化三丁基锡(tbth)的存在下,从1,2二溴化物开始可轻松在几秒钟内制备不饱和烃.研究了起始二卤化物性质的依赖性.
Doi:10.1016/s0040-4020(97)10203-4

专利信息

专利号:US-9994602-B2
优先权日:2010-12-27
标 题 :Spiroannulated nucleosides and process for the preparation thereof
发明人：CHEPURI VENKATA RAMANA; DUSHING MANGESH PANDURANG
权利人:COUNCIL SCIENT IND RES
摘要:We claim a simple strategy for the synthesis of a collection of C(3′)-spirodihydroisobenzo-furannulated and C(3′)-spirodihydroisobenzo-furannulated nucleosides featuring a [2+2+2]-cyclotrimerization as the key reaction. The cyclotrimerization reactions are facile with the unprotected nucleosides having a diyne unit. When both alkynes of the diyne are terminal, the regioselectivity is poor. However, when one of the terminal alkynes is additionally substituted, the cyclotrimerizations are highly diastereoselective. Since the key bicycloannulation is the final step, this strategy provides flexibility in terms of the alkynes and is thus amenable for the synthesis of a focussed small molecule library.

专利号:US-6995001-B2
优先权日:2002-10-03
标题 :Processing for preparing monoprotected diols from symmetric diols
发明人：GU JIANXIN; RUPPEN MARK EDWARD
权利人:WYETH CORP
摘要:This invention provides a two-step enzymatic process for the synthesis of monoprotected diols from symmetric diols.