Correlation of carbon-13 substituent-induced chemical shifts:Meta- andpara-substituted methyl benzoates
作者:Miloš Buděšńský、Otto Exner
DOI:10.1002/mrc.1260270612
日期:1989.6
Carbon‐13 NMR spectra are reported for 69 substituted methyl benzoates in deuteriochloroform or in its mixture with dimethylsulphoxide‐d6. The substituent‐induced chemicalshifts (SCS) of the CO carbon correlate poorly with dual substituent parameters (DSP) in all possible modifications, and for meta derivatives in particular this correlation is both overpara meterized and imprecise. A much better
Synthesis of Sulfonyl Azides via Lewis Base Activation of Sulfonyl Fluorides and Trimethylsilyl Azide
作者:John Moses、Andrew Barrow
DOI:10.1055/s-0035-1561626
日期:——
A protocol for the efficient conversion of sulfonyl fluorides into sulfonyl azides through Lewis base activation is described. The in situ generated sulfonyl azides are efficient diazo-transfer agents, affording diazo compounds and primary azides in excellent yields.
a transition metal, is described using a novel partner in the Suzuki–Miyaura couplingreaction catalyzed by Pd(OAc)2 and Ruphos as ligands. The products showed good to outstanding yields and broad functional group compatibility under optimal conditions. The sequentialsynthesis of non-symmetric terphenyls and the gram grade process highlight the approach's synthetic utility. DFT calculations have shown
A highly efficient method for the synthesis of aryl sulfonyl fluorides was developed from aryl sulfonyl chlorides using SO2F2 as fluoride source in up to 98% isolated yield under mild conditions. Gram scale experiments were also conducted, revealing the good practicality of this new protocol.
一种高效合成芳基磺酰氟的方法是从芳基磺酰氯中开发的,使用 SO 2 F 2作为氟化物源,在温和条件下分离收率高达 98%。还进行了克级实验,揭示了这种新协议的良好实用性。
Scalable, Chemoselective Nickel Electrocatalytic Sulfinylation of Aryl Halides with SO
<sub>2</sub>
作者:Terry Shing‐Bong Lou、Yu Kawamata、Tamara Ewing、Guillermo A. Correa‐Otero、Michael R. Collins、Phil S. Baran
DOI:10.1002/anie.202208080
日期:2022.9.12
electrochemistry, the conversion of arylhalides to sulfinates using an inexpensive Ni catalyst at room temperature is reported. The use of SO2 stock solution at controlled concentration represents a convenient sulfur source. The sulfinate intermediates can be derivatized into sulfonyl fluorides, sulfonamide, and sulfone in a one-pot fashion. This reaction exhibits a broadsubstratescope and can be easily scaled