Benzylsilane and benzyltin compounds were oxidized by oxovanadium(V) compound under an oxygen atmosphere to afford the corresponding aromatic aldehydes (ketones) and/or carboxylic acids. In the reaction of benzyltins, oxovanadium(V) compound can be reduced to 0.5 molar amounts. The reaction of benzylsilanes is considered to proceed via electron-transfer process. On the other hand, benzyltins may undergo
Cleavage Mode of Benzyltributylstannane Radical Cations Produced in Photoinduced Electron Transfer
作者:Shunichi Fukuzumi、Kiyomi Yasui、Shinobu Itoh
DOI:10.1246/cl.1997.161
日期:1997.2
Cleavage of metal-carbon bond of benzyltributylstannane radical cation produced in photoinduced electron transfer from benzyltributylstannane to 10-methylacridinium ion occurs to give benzyl radical rather than benzyl cation, resulting in formation of 9-benzyl-10-methyl-9,10-dihydroacridine selectively in dehydrated acetonitrile. In the presence of water, however, 10-methyl-9,10-dihydroacridine is also formed via electron transfer from benzyl radical to the dihydroacridine radical cation produced by protonation of acridinyl radical following the initial photoinduced electron transfer.
Iron Porphyrin Catalyzed Insertion Reaction of <i>N</i>-Tosylhydrazone-Derived Carbenes into X–H (X = Si, Sn, Ge) Bonds
作者:En-Hui Wang、Yuan-Ji Ping、Zong-Rui Li、Hongling Qin、Zhen-Jiang Xu、Chi-Ming Che
DOI:10.1021/acs.orglett.8b01931
日期:2018.8.3
An efficient Fe(TPP)Cl catalyzed insertionreaction of in situ generated benzylic carbenes from N-tosylhydrazones into X–H (X = Si, Sn, Ge) was developed. Silanes bearing tertiary, secondary, and primary (3°, 2°, and 1°) Si–H bonds all reacted well to afford insertion products in moderate to high yields (up to 97%), and the reaction time could be significantly shortened to 1 h under microwave irradiation
Synthesis of Benzyltributylstannanes by the Reaction of <i>N</i>-Tosylhydrazones with Bu<sub>3</sub>SnH
作者:Di Qiu、Shuai Wang、He Meng、Shengbo Tang、Yan Zhang、Jianbo Wang
DOI:10.1021/acs.joc.6b02639
日期:2017.1.6
An efficient stannylation process with Ntosylhydrazones or directly with carbonyl compounds has been developed. A series of functionalized benzyl-and alkyltributylstannanes can be synthesized in moderate to good yields under transition-metal-free conditions. Tandem transformations involving stannylation/Stille cross-coupling reaction have been carried out without purification of the benzyltributylstannane intermediates to afford a series of diarylmethane derivatives.