3.苯乙烯的氢硅基化反响6 \o Current Document 3.4.其他反响7 \o Current Document 参考文献:8 1.意外的发现 2015年,Grubbs和Stoltz等人报道了 t-BuOK催化的芳环C-H键芳基化反 应,为有机硅化合物的合成带来了新的思路,防止了传统方法中活泼试剂和贵 金属催化剂的使用。该方法反响条件温和,产率高达94%,...
本文阐述了n-BuLi/t-BuOK引发体系溶液了苯共聚的"多活性种互换"模型; 重点分析了钾活性种在本体系中的动力学行为;指出钾活性种不仅增长苯乙烯而且增 长丁二烯;对增长丁二烯来说,丁苯共聚时钾活性种的活性是锂活性种的九倍以上; 本文推导了共聚组成方程式,指出了表观竞聚率的复杂性,并根据我们的实验结果, 计算了...
t-BuOK-Mediated Iodoaziridination Reaction of N-Allylic Tosylamide Derivatives Haloamidation of the N-tosyl-4-pentenylamines (I) and (IV) proceeds stereoselectively, yielding the cis-2-halomethyl-3-hydroxypyrrolidines (II), (III), and... Osamu,Kitagawa,Takashi,... - 《Journal of Organic Che...
ChemInform Abstract: t-BuOK-Mediated Iodoaziridination Reaction of N-Allylic Tosylamide Derivatives.doi:10.1002/chin.199849129aziridinederivativesstereochemistry(generalopticalresolution)ChemInform is a weekly ing Service, delivering concise information at a glance that was extracted from about 100 leading ...
研究目的 Product distribution//Mechanism 其他条件 several substrate and acid concentration; other hydrogen halogenides and reagents in the second step; further anilines; 1.) water, poly(ethylene glycol), CH2Cl2, 0 ℃; 2.) poly(ethylene glycol), CH 反应条件5 试剂NaNO2, chlorotrimethylsilane,...
Since it was anticipated that this might be a slow initiation and fast propagation system, the dependence of apparent CPE (aCPE)16 on the reaction conditions was also examined in the pres- ence of excess BuOK over a SB as a preliminary study. The results with the molar ratio ofBuOK: SB ...
ingly, pyrroles 5 remained absolutely inert in this reaction and were recovered without apparent loss. We believe that the mechanismof the formation of 4,5-dihydro- 3H-azepines 1 and 3H-azepines 2 in our case corresponds to that depicted in Scheme of Table 2. Indeed, the reorganization of...
ChemInform Abstract: Promotion Effect of tBuOK on the Reaction of Bromolithiocarbenoids at Low Temperaturesorgano‐silicon compounds, isocyclic C derivativesother naphthalene derivativesfused phenylcycloalkyl derivatives (rings with 3, 4, 7 or more members...
A highly effective aldol reaction mediated by Ti(O-n-Bu)(4)/t-BuOK combined reagentaldol reactionsenalstitanium and compoundsA combined reagent derived from Ti(O- n-Bu) 4 and KO- t-Bu (1:1) has proved to be very effective for the self-aldol addition and also for the cross-aldol ...
t-BuOK promoted coupling of alkynes and aldehydes: a concise synthetic method of beta,gamma-unsaturated enonewsKETONESMECHANISMALCOHOLSOLEFINSA KO'Bu-promoted coupling reaction of aldehydes and alkynes without a transition-metal catalyst was developed, in which the sequential addition/isomerization ...