Further functional group oxidations using sodium perborate
作者:Alexander McKillop、Duncan Kemp
DOI:10.1016/s0040-4020(01)81008-5
日期:1989.1
Sodiumperborate in acetic acid is an effective reagent for the oxidation of aromatic aldehydes to carboxylic acids, iodoarenes to (diacetoxyiodo)arenes, azines to -oxides, and various types of sulphur heterocycles to ,-dioxides. Nitriles are unaffected by the reagent in acetic acid, but undergo smooth hydration to amides when aqueous methanol is employed as solvent.
Tandem Catalytic C(sp<sup>3</sup>)H Amination/Sila-Sonogashira-Hagihara Coupling Reactions with Iodine Reagents
作者:Julien Buendia、Benjamin Darses、Philippe Dauban
DOI:10.1002/anie.201412364
日期:2015.5.4
A new tandem CN and CC bond‐forming reaction has been achieved through RhII/Pd0 catalysis. The sequence first involves an iodine(III) oxidant, then the in situ generated iodine(I) by‐product is used as a coupling partner. The overall process demonstrates the synthetic value of iodoarenes produced in trivalent iodine reagent mediated oxidations.
通过Rh II / Pd 0催化实现了一个新的串联CN和CC键形成反应。该序列首先涉及碘(III)氧化剂,然后将原位生成的碘(I)副产物用作偶联伴侣。整个过程证明了在三价碘试剂介导的氧化反应中产生的碘代芳烃的合成价值。
Biomimetic total synthesis of (−)-codeine
作者:James D. White、Giorgio Caravatti、Toni B. Kline、Eric Edstrom、Kenner C. Rice、Arnold Brossi
DOI:10.1016/s0040-4020(01)91965-9
日期:1983.1
The opium alkaloid (−)-codeine was synthesized in eight steps from (±)-N-norreticuline R-(−)-norreticuline, obtained by resolution, was converted to (R)-N-trifluoroacetyl-6'-bromonorreticuline and the latter was subjected to phenolic oxidative coupling with a variety of aryliodoso complexes in dichloromethane. N-Trifluoroacetyl-1-bromonorsalutaridine prepared by this means was transformed to 1-bromosalutaridinol
Base-Free Selective <i>O</i>
-Arylation and Sequential [3,3]-Rearrangement of Amidoximes with Diaryliodonium Salts: Synthesis of 2-Substituted Benzoxazoles
作者:Wei-Min Shi、Xiao-Hua Li、Cui Liang、Dong-Liang Mo
DOI:10.1002/adsc.201700906
日期:2017.12.11
of functionalized 2‐substituted benzoxazoles can be prepared in good yields from amidoximes and diaryliodonium salts by selective O‐arylation and sequential [3,3]‐rearrangement under metal‐free conditions. O‐arylation of amidoximes was promoted by 3 Å molecule sieves in the absence of a base and a sequential TFA‐mediated [3,3]‐rearrangement was used to synthesize 2‐substituted benzoxazoles. Both of