Highly Regio- and Stereoselective Synthesis of (1Z,3E)-2-sulfonyl-3-stannyl-1,3-dienes by hydrostannylation of (Z)-2-sulfonyl-1,3-enynes
摘要:
The Stille coupling of (E)-alpha-stannylvinyl sulfones with alkynyl bromides in DMF in the presence of Pd(PPh3)(4) and CuI gave (Z)-2-sulfonyl-1,3-enynes in good yields. (Z)-2-Sulfonyl-1,3-enynes underwent palladium-catalysed hydrostannylation with tributyltin hydride to afford highly regio- and stereoselectively (1Z,3E)-2-sulfonyl-3-stannyl-1,3-dienes.
Stereoselective synthesis of functionalized (1E,5E)-1,5-dien-3-ynes containing ester or sulfonyl groups by palladium-catalyzed addition and cross-coupling reactions
作者:Wenyan Hao、Shiyun Xie、Yichao Wu、Mingzhong Cai
DOI:10.1039/c4nj00087k
日期:——
Stereoselective synthesis of (1E,5E)-1-sulfonyl (or ethoxycarbonyl)-substituted 1,5-dien-3-ynes has been described.
(1E,5E)-1-磺酰基(或乙氧羰基)取代的1,5-二烯-3-炔的立体选择性合成已经被描述。
A Shift in Retrosynthetic Paradigm
作者:Ilan Marek
DOI:10.1002/chem.200800580
日期:2008.8.28
The current state-of-the-art synthesis for the formation of enantiomerically enriched all-carbon quaternary stereocenters in acyclic system relies on the formation of a single carbon-carbon bond per chemical step by asymmetric catalysis. These extraordinary sophisticated methods were logically classified among the most powerful and innovative ones. In this concept article, we are proposing a new retrosynthetic
A One-Pot, Stereoselective Synthesis of 1,3- and 1,4-Dienyl Sulfones by Hydrostannylation-Stille Tandem Reaction of Tributyltin Hydride with Acetylenic Sulfones and Alkenyl or Allylic Halides
作者:Mingzhong Cai、Guiqin Chen、Wenyan Hao
DOI:10.1055/s-2007-965977
日期:2007.4
1,3-Dienyl and 1,4-dienyl sulfones can be stereoselectively synthesized in one pot under mild conditions, in good yields, by the palladium-catalyzed hydrostannylation of acetylenic sulfones, followed by Stille coupling with alkenyl or allylic halides, respectively.
<i>anti</i>-Hydroarylation of Activated Internal Alkynes: Merging Pd and Energy Transfer Catalysis
作者:Javier Corpas、Pablo Mauleón、Ramón Gómez Arrayás、Juan C. Carretero
DOI:10.1021/acs.orglett.0c02281
日期:2020.8.21
electron-poor and electron-rich aryl reagents is reported. This selectivity is achieved through a sequential syn-carbopalladation of the alkyne by an Ar–Pd species, followed by a tandem, Ir-photocatalyzed, counter-thermodynamic E → Z isomerization. The use of ortho-substituted boronic acids enables direct access to pharmaceutically relevant heterocyclic cores via a cascadeprocess. Mechanistic insight
Regiodivergent Rhodium(I)-Catalyzed Azide–Alkyne Cycloaddition (RhAAC) To Access Either Fully Substituted Sulfonyl-1,2,3-triazoles under Mild Conditions
A regiodivergent Rh(I)-catalyzed azide–alkynecycloaddition (RhAAC) was developed for the synthesis of both fully substituted 4-sulfonyl-1,2,3-triazoles and 5-sulfonyl-1,2,3-triazoles in high regioselectivities and yields undermildconditions in one step. Nonmetallic sulfur(II) or sulfur(VI) could efficiently control the regioselectivity of RhAAC reactions by chelation or nonchelation mechanisms to