One-Pot, Direct Incorporation of [<sup>11</sup>C]CO<sub>2</sub>into Carbamates
作者:Jacob M. Hooker、Achim T. Reibel、Sidney M. Hill、Michael J. Schueller、Joanna S. Fowler
DOI:10.1002/anie.200900112
日期:2009.4.27
Why beat about the bush? An operationally simple and mild reaction based on the direct fixation of 11CO2 with 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU) has been developed for the synthesis of 11C‐labeled carbamates at 75 °C within 10 minutes in radiochemical yields above 70 % (see scheme). This strategy should be immediately useful for the construction of new radiotracers for positron emission tomography
为什么要打灌木丛?基于11 CO 2与 1,8-二氮杂双环 [5.4.0] 十一碳烯 (DBU)直接固定的操作简单且温和的反应已被开发用于在 75 °C 下合成11 C 标记的氨基甲酸酯10 分钟内,放射化学产率超过 70%(参见方案)。该策略对于构建用于正电子发射断层扫描和其他应用的新型放射性示踪剂应立即有用。
作者:Jorge Andrés Mora Vargas、Antonio C. B. Burtoloso
DOI:10.1002/cssc.202300936
日期:2023.12.7
A novel and advantageous protocol for accessing carbamates through the known three-component coupling reaction involving carbondioxide, amines, and alkyl halides is described. Employing mild conditions, simple experimental set-up, and immobilized DBU, this protocol addresses several drawbacks from the previous described methods. No classical purification procedures are necessary and the immobilized
[EN] METHOD AND COMPOSITIONS FOR CONTROLLING RELEASE OF ORGANIC COMPOSITIONS<br/>[FR] PROCEDE ET COMPOSITIONS DE CONTROLE DE LA LIBERATION DE COMPOSITIONS ORGANIQUES
申请人:UNIV MICHIGAN STATE
公开号:WO2006074261A2
公开(公告)日:2006-07-13
[EN] A method and compositions using layered clays with monovalent potassium, ammonium or cesium ions in the galleries of the clay which are also occupied by a preferably polar or semi polar organic compound. The method and compositions are particularly useful for controlled release of pesticides, insecticides, herbicides, fungicides, nematocides and contaminants in the presence of calcium or magnesium, or other naturally occurring inorganic cations as divalent displacement ions providing the release. [FR] L'invention concerne un procédé et des compositions utilisant des argiles en couches avec des ions de potassium, d'ammonium ou de césium monovalents dans les galeries de l'argile, qui sont également occupées par un composé organique, de préférence, polaire ou semi-polaire. Ce procédé et ces compositions sont particulièrement utiles pour la libération contrôlée de pesticides, d'insecticides, d'herbicides, de fongicides, de nématocides et de contaminants en présence de calcium ou de magnésium ou d'autres cations anorganiques d'origine naturelle comme des ions de déplacement divalents apportant la libération.