<i>N</i>-Radical Initiated Aminosulfonylation of Unactivated C(sp<sup>3</sup>)–H Bond through Insertion of Sulfur Dioxide
作者:Yuewen Li、Runyu Mao、Jie Wu
DOI:10.1021/acs.orglett.7b02010
日期:2017.9.1
N-Radical initiated aminosulfonylation of unactivated C(sp3)–H bond through insertion of sulfur dioxide in the presence of visible light is reported. O-Aryl oximes react with DABCO·(SO2)2 smoothly at room temperature under blue LED irradiation without any metals or photoredox catalysts, generating diverse 5,6-dihydro-4H-1,2-thiazine 1,1-dioxides in good yield. Additionally, this approach can be extended
据报道,在可见光存在下,通过插入二氧化硫,N-自由基引发了未活化的C(sp 3)-H键的氨基磺酰化反应。室温下,O-芳基肟与DABCO·(SO 2)2在没有任何金属或光氧化还原催化剂的情况下在蓝色LED照射下平稳地反应,在其中生成各种5,6-二氢-4 H -1,2-噻嗪1,1-二氧化物。良品率高。另外,该方法可以扩展到1 H-苯并[ d ] [1,2]噻嗪2,2-二氧化物的合成。在反应过程中,通过用DABCO·(SO 2)处理O-芳基肟来引发N-自由基。2在可见光照射下。随后通过1,5-氢原子转移与附近的C(sp 3)–H键进行氨基磺酰化,并伴有二氧化硫的插入,从而提供1,2-噻嗪1,1-二氧化物衍生物。
Mn-Enabled Radical-Based Alkyl–Alkyl Cross-Coupling Reaction from 4-Alkyl-1,4-dihydropyridines
efficient alkylation of β-chloro ketones and their derivatives was achieved by means of domino dehydrochlorination/Mn-enabled radical-based alkyl-alkyl cross-coupling reaction. In situ-generated α,β-unsaturated ketones and their analogues were identified as the reaction intermediates. Known bioactive compounds, such as melperone and azaperone, could be easily prepared from β-chloropropiophenone in two
Deactivation of triplet phenyl alkyl ketones by conjugatively electron-withdrawing substituents
作者:Peter J. Wagner、Elizabeth J. Siebert
DOI:10.1021/ja00414a048
日期:1981.12
INHIBITORS OF PROTEIN TYROSINE PHOSPHATASES
申请人:INDIANA UNIVERSITY RESEARCH & TECHNOLOGY CORPORATION
公开号:US20150239931A1
公开(公告)日:2015-08-27
Novel protein tyrosine phosphatase (PTP) inhibitor compounds synthesized from phosphonodifluoromethyl phenylalanine (F2Pmp) are provided. Use of these compounds for inhibiting a PTP enzyme (such as PTP-MEG2), as well as treating a disease, disorder, or condition associated with inappropriate activity of a PTP (such as type 2 diabetes), is also provided.