The regioselectivity of Diels–Alder reactions with neutral electron demand between 1,3-dienes with alkynes can be controlled by simple cobalt diimine complexes so that the meta-substituted cycloadducts are generated in good yields and excellent regioselectivity (see scheme; DDQ=2,3-dichloro-5,6-...
actions †]]>doi:10.1002/anie.2006019741,3‐dienesalkynescobaltcycloadditionregioselectivityThis work was supported by the DFG (Deutsche Forschungsgemeinschaft).Gerhard Hilt Prof. DrJudith JanikowskiWilfried HessAngewandte Chemie International Edition...
meta directing group 英 [ˈmɛtə dəˈrektɪŋ ɡruːp] 美 [ˈmitə dəˈrektɪŋ ɡruːp]间位定位基
directing character 【计】 定向字符 directing sign 指向标 directing station 【计】 操纵站 相似单词 meta pref. 变换,改变,在后的 meta 表示“在其中, 在后”之义 torpedo directing sight 鱼雷瞄准具 self directing [ self-direction ]的相关形容词 group n.[C] 1.组,群,批,类,簇 2.集团...
meta directing group 英文meta directing group 中文【化】 间位定位基
meta-directing group【有化】分享到: 间位定位基分类: 科技词汇 | 查看相关文献(pubmed) | 免费全文文献 详细解释:以下为句子列表:分享到: 赞助商链接 你知道它的英文吗? ·间氨基苯甲酸甲基磺酸盐 ·变态类 ·钙代谢紊乱 ·变色现象 ·变色(反应)性 ·变色机能 ·变晶 ·变晶的 ...
[2] While the ortho/para-selectivity of the thermalDiels–Alder reaction allows access to ortho- or para-substituted products (such as 1,Scheme 1) the intermolecularreaction is limited to the generation of para-substitutedproducts when starting from isoprene,the meta-substitutedproducts of...
Gu S X,Jing H W,Wu J G, et al.A Convenient Method of Meta-Directing Nitration of 3-Substituted Phenol by Lanthanide (Ⅲ) Nitrates. Synthetic Communications . 1997Gu S X,Jing H W,Wu J G, et al.A Convenient Method of Meta-Directing Nitration of 3-Substituted Phenol by Lanthanide (Ⅲ...
Para selectivity in the conversion of a monosubstituted benzene containing a meta-directing group to disubstituted benzenes can be substantially enhanced by carrying out the reaction in the gas phase with an inorganic or organic substitution agent in the presence of a catalyst composition comprising a...
Gu S X,Jing H W,Wu J G, et al.A Convenient Method of Meta-Directing Nitration of 3-Substituted Phenol by Lanthanide (Ⅲ) Nitrates. Synthetic Communications . 1997Gu S X,Jing H W,Wu J G, et al.A Convenient Method of Meta-Directing Nitration of 3-Substituted Phenol by Lanthanide (Ⅲ...