<i>trans</i>
‐Carbocarbonation of Internal Alkynes through a Formal
<i>anti</i>
‐Carbopalladation/C−H Activation Cascade
作者:Andreas Reding、Peter G. Jones、Daniel B. Werz
DOI:10.1002/anie.201805399
日期:2018.8.13
An intramolecular Pd‐catalyzed cascade reaction is presented that consists of a formal anti‐carbopalladation of a C−C triple bond followed by C−H activation. As a result, oligocyclic ring systems with an embedded tetrasubstituted double bond are formed. The key to success in affording the trans geometry of the emerging double bond are alkyne units with residues that must not undergo β‐hydride elimination
Synthesis of Substituted Thiophenes through Dehydration and Heterocyclization of Alkynols
作者:Jian Li、Yang Liu、Zebin Chen、Jiaming Li、Xiaoliang Ji、Lu Chen、Yubing Huang、Qiang Liu、Yibiao Li
DOI:10.1021/acs.joc.1c03114
日期:2022.3.4
described for obtaining a variety of substituted thiophenes with functional potential via metal-free dehydration and sulfur cyclization of alkynols with elementalsulfur (S8) or EtOCS2K in moderate-to-good yields. The method provides the base-free generation of a trisulfurradicalanion (S3•–) and its addition to alkynes as an initiator. This research broadens the applications of S3•– in the synthesis
描述了一种方案,用于通过无金属脱水和硫环化炔醇与元素硫 (S 8 ) 或 EtOCS 2 K 以中等至良好的产率获得各种具有功能潜力的取代噻吩。该方法提供了无碱生成三硫自由基阴离子 (S 3 •– ) 并将其添加到炔烃中作为引发剂。本研究拓宽了S 3 •–在含硫杂环合成中的应用。
Thermal rearrangements of propargylic trichloroacetimidates. Synthesis of (trichloroacetamido)-1,3-dienes and -1,2-dienes
作者:Larry E. Overman、Lane A. Clizbe、Robert L. Freerks、Charles K. Marlowe
DOI:10.1021/ja00400a053
日期:1981.5
OVERMAN L. E.; CLIZBE L. A.; FREERKS R. L.; MARLOWE C. K., J. AMER. CHEM. SOC., 1981, 103, NO 10, 2807-2815
作者:OVERMAN L. E.、 CLIZBE L. A.、 FREERKS R. L.、 MARLOWE C. K.
DOI:——
日期:——
OVERMAN L. E.; TSUBOI S., J. AMER. CHEM. SOC. <JACS-AT>, 1977, 99, NO 8, 2813-2815