Benzoheteroles 是药物化学中有价值的支架,但 3-乙烯基 benzoheterole 类似物的直接合成仍未探索。一种合理设计的新型含 1,6-烯炔的炔丙醇已制备用于 3-烯基苯并杂环的模块化合成。实现了 1,6-烯醇与亚磺酸钠的银催化级联自由基磺酰化环化反应,以高收率获得各种 2,3-二取代苯并杂环化合物。此外,1,6-烯醇、芳基重氮盐和 Na 2 S 2 O 5的三组分偶联(作为 SO 2替代品)已经实现以中等到良好的收率提供苯并杂环衍生物。值得注意的是,成功展示了可扩展的反应和后期合成转化。还根据现有实验结果和对照实验提出了一种似是而非的机制。
Intramolecular Chirality Transfer [2 + 2] Cycloadditions of Allenoates and Alkenes
作者:Yao Xu、Young J. Hong、Dean J. Tantillo、M. Kevin Brown
DOI:10.1021/acs.orglett.7b01420
日期:2017.7.21
Intramolecular chirality transfer [2 + 2] cycloaddition of enantiomerically enriched allenoates and alkenes is presented. The use of a chiral catalyst was found to be critical to achieve high levels of diastereoselectivity compared to use of an achiral catalyst. The method developed leads to highly substituted cyclobutanes that would be difficult to prepare by alternative methods.
A visible-light-induced cascade reaction of 2-vinyloxy arylalkynes with thiosulfonates was developed and provided unexpected thio-substituted dibenzofuranderivatives in moderate yields. Mechanistic studies revealed the thiosulfonylation product of 2-vinyloxy arylalkyne was the key intermediate, and the additive disulfide played the role of hydrogen abstraction in the aromatization process to offer
[2 + 2] Cycloaddition of <i>o</i>-Carboryne with Vinyl Ethers: Synthesis of Carborane-Fused Cyclobutanes
作者:Jie Zhang、Zuowei Xie
DOI:10.1021/acs.organomet.0c00163
日期:2020.12.14
precursor, o-carboryne undergoes an efficient [2 + 2] cycloaddition with a large variety of vinylethers at room temperature to give a series of carborane-fused cyclobutanes in very good to high isolated yields. This reaction is compatible with many functional groups and has a very broad substrate scope ranging from alkyl- to aryl- and to silyl-substituted vinylethers. A stepwise reaction mechanism is proposed
Provided are compounds represented by Formula I, wherein R3, A, A1, A2, A3, E, E1, E2, L, Q, Z, and (aa) are as defined in the specification, and the pharmaceutically acceptable salts and solvates thereof. Compounds of Formula (I) are KRAS inhibitors and are thus useful to treat cancer and other diseases.