Chemoselective and stereospecific iodination of alkynes using sulfonium iodate(<scp>i</scp>) salt
作者:Dodla S. Rao、Thurpu R. Reddy、Sudhir Kashyap
DOI:10.1039/c7ob03076b
日期:——
An efficient and highly chemoselective iodination of alkynes using a sulfoniumiodate(I) electrophilc reagent under metal-free conditions has been realized. The reactivity of sulfoniumiodate(I) salt could be significantly diverse in the presence of water as the solvent, enabling the (E)-1,2-diiodoalkenes stereospecifically. This stereodivergent approach is amenable to a wide range of alkyne substrates
Efficient synthesis of 1-iodoalkynes <i>via</i> Al<sub>2</sub>O<sub>3</sub> mediated reaction of terminal alkynes and <i>N</i>-iodosuccinimide
作者:Ming Yao、Jingjing Zhang、Sen Yang、Hangxing Xiong、Li Li、E. Liu、Hong Shi
DOI:10.1039/d0ra00251h
日期:——
Iodination of terminalalkynes using N-iodosuccinimide (NIS) in the presence of γ-Al2O3 was developed to afford 1-iodoalkynes with good to excellent yields (up to 99%). This described approach featured excellent chemoselectivity, good functional group tolerance, and utilization of an inexpensive catalyst.
开发了在 γ-Al 2 O 3存在下使用N-碘代琥珀酰亚胺 (NIS) 对末端炔进行碘化,以提供良好至优异产率(高达 99%)的 1-碘炔。这种方法具有优异的化学选择性、良好的官能团耐受性以及使用廉价催化剂的特点。
Acetic Acid Promoted Direct Iodination of Terminal Alkynes with N-Iodosuccinimide: Efficient Preparation of 1-Iodoalkynes
作者:Ming Yao、Hangxing Xiong、Jingjing Zhang、Sen Yang、E Liu
DOI:10.1055/s-0040-1708002
日期:2020.7
An efficient and highly chemoselective approach for the direct iodination of terminal alkynes using acetic acid as N-iodosuccinimide activated reagent under metal-free conditions has been developed. This facile process tolerates a variety of terminal alkynes and provides the desired products in good to excellent yields (up to 99%).
Catalytic and Computational Studies of N-Heterocyclic Carbene or Phosphine-Containing Copper(I) Complexes for the Synthesis of 5-Iodo-1,2,3-Triazoles
作者:Steven Lal、Henry S. Rzepa、Silvia Díez-González
DOI:10.1021/cs500326e
日期:2014.7.3
Two complementary catalytic systems are reported for the 1,3-dipolar cycloaddition of azides and iodoalkynes. These are based on two commercially available/readily available coppercomplexes, [CuCl(IPr)] or [CuI(PPh3)3], which are active at low metal loadings (PPh3 system) or in the absence of any other additive (IPr system). These systems were used for the first reported mechanistic studies on this