One-step facile synthesis of deuterium labeled aldehydes from tertiary amides using Cp2Zr(D)Cl
作者:Jared T. Spletstoser、Jonathan M. White、Gunda I. Georg
DOI:10.1016/j.tetlet.2004.02.030
日期:2004.3
The synthesis of deuterium labeled aldehydes was accomplished in an expedient and facile manner through the reduction of amidesusing commercially available Cp2Zr(D)Cl. The reactions proceeded rapidly (ca. 15 min) and in high yields (70–99%).
Lewis Acid Catalyzed Enlargement of Cyclic β-Alkoxyenals and One-Pot Synthesis of Polyfunctional Enoxysilanes Derived from Aucubin with Trimethylsilyldiazomethane
homologations dependent on the nature of carbonyl function and catalysts have been observed during the formation of enoxysilanes (see scheme). Trimethylsilyl trifluoromethanesulfonate (TMSOTf) and AlCl3 were identified as suitable catalysts to promote the homologation and ring‐enlargement.
Aldehydes were prepared fromGrignardreagents in high yields using pentacarbonyliron as the carbonylating agent. This reaction was also found to be applicable to the synthesis of aldehydes-d.
使用五羰基亚铁作为羰基化剂,由格氏试剂以高产率制备醛。还发现该反应适用于醛-d的合成。
Avermectin biosynthesis. Intact incorporation of a diketide chain-assembly intermediate into the polyketide macrocyclic ring
作者:Christopher J. Dutton、Antony M. Hooper、Peter F. Leadlay、James Staunton
DOI:10.1016/s0040-4039(00)76544-0
日期:1994.1
Incorporation experiments in Streptomyces avermitilis with synthetic analogues of the proposed diketide intermediate support the processive mechanism of chain assembly in the biosynthesis of the polyketide core of the avermectin structure. Specific incorporation of a 13C labelled precursor was established by 13C NMR; intact incorporation of two deuterium-labelled analogues was established by electrospray
阿维链霉菌与拟定的二酮化合物中间体的合成类似物的掺入实验支持阿维菌素结构聚酮化合物核心生物合成中链组装的过程机理。通过13 C NMR确定了13 C标记的前体的特异性结合。通过电喷雾质谱(ESMS)建立了两个氘标记的类似物的完整整合。
Visible-Light Photoredox-Catalyzed Decarboxylation of α-Oxo Carboxylic Acids to C1-Deuterated Aldehydes and Aldehydes
作者:Chun-Hong Hu、Yang Li
DOI:10.1021/acs.joc.2c02299
日期:——
deuterated lead compounds for deuterium-labeled drug discovery. Herein, we develop a metal-free synthesis of C1-deuterated aldehydes with D2O from α-oxo carboxylicacids at ambient temperature. Via visible-light photoredox-catalyzed decarboxylation, stoichiometric reductants and oxidants were avoided. Various functional groups were tolerated and resulted in C1-deuterium aldehydes in up to 92% yield
高附加值的 C1-氘代醛的合成将提高用于氘标记药物发现的氘化先导化合物的可用性。在此,我们开发了一种在环境温度下从 α-氧代羧酸中用 D 2 O无金属合成 C1-氘代醛的方法。通过可见光光氧化还原催化脱羧,避免了化学计量的还原剂和氧化剂。可以耐受各种官能团,并在温和条件下以高达 92% 的产率和 91-97% 的 D 掺入率产生 C1-氘醛。该方法也适用于各种醛的合成。主要机理研究表明,催化途径通过还原猝灭途径发生,然后是氢原子转移。