Benzyne 1,2,4-Trisubstitution and Dearomative 1,2,4-Trifunctionalization
作者:Jiarong Shi、Lianggui Li、Chunhui Shan、Zhonghong Chen、Liang Dai、Min Tan、Yu Lan、Yang Li
DOI:10.1021/jacs.1c04389
日期:2021.7.21
4-trifunctionalization of benzyne have been accomplished from sulfoxides bearing a penta-2,4-dien-1-yl moiety. These cascade transformations proceed through a benzyne insertion into the S═O bond and an uncommon regiospecific anionic [4,5]-sigmatropic rearrangement, furnishing a C–O, C–S, and C–C bond on the C1-, C2-, and C4-position of a benzene ring, respectively. This study showcases new cascade benzyne reaction
Regioselective Synthesis of C3-Hydroxyarylated Pyrazoles
作者:Leonie O’Sullivan、Ketul V. Patel、Ben C. Rowley、Duncan K. Brownsey、Evgueni Gorobets、Benjamin S. Gelfand、Jeffrey F. Van Humbeck、Darren J. Derksen
DOI:10.1021/acs.joc.1c02518
日期:2022.1.7
report the first regioselective route to C3-hydroxyarylated pyrazoles obtained through reaction of pyrazole N-oxides with arynes using mild conditions. Importantly, this method does not require the C4 and C5 positions of the pyrazole to be functionalized to observe regioselectivity. Using this method, we completed the synthesis of a recently reported JAK 1/2 inhibitor. Our synthesis produces the desired
Access to Spiroindanolactones/lactams through an Aryne Insertion/Spirocyclization Strategy
作者:Y. N. Sambasiva Rao、Palash Ghosh、Prathama S. Mainkar、Srivari Chandrasekhar
DOI:10.1021/acs.orglett.2c02046
日期:2022.7.29
An efficient and metal-free strategy for the synthesis of spiro-fused indanolactones/lactams has been developed for the reaction of arynes with α-chloroacetyl lactones/lactams. This strategy provides access to spiroindanone derivatives via aryne insertion/spirocyclization.
Regioselective Aromatic Perfluoro-<i>tert</i>-butylation Using Perfluoro-<i>tert</i>-butyl Phenyl Sulfone and Arynes
作者:Zhiqiang Wei、Lixian Wen、Kaidi Zhu、Qian Wang、Yanchuan Zhao、Jinbo Hu
DOI:10.1021/jacs.2c10479
日期:2022.12.7
synthetic protocol to realize aromatic perfluoro-tert-butylation. The key to the success is the identification of PFtB phenyl sulfone as a new source of PFtB anion, which reacts with arynes in a highly regioselective manner to afford perfluoro-tert-butylated arenes in high yields. The application of the method is demonstrated by the preparation of sensitive 19F-labeled NMRprobes with an extraordinary resolving
Easy Access to Phenanthridinones via Metal-Free Cascade Benzannulation and C–N Bond Formation
作者:Preeti、Kailas V. Kallurkar、Prathama S. Mainkar、Raju Adepu、Srivari Chandrasekhar
DOI:10.1021/acs.orglett.3c03040
日期:2023.12.1
A concise route for the synthesis of dihydrobenzo[j]phenanthridinones has been disclosed through an aryne annulationstrategy under metal-free reaction conditions. The reaction involves multiple C–C and C–N bond cleavages/formations via Diels–Alder reaction, aromatization-driven C–N bond cleavage, and amide formation.