Carbon–Sulfur Bond Formation: Tandem Process for the Synthesis of Functionalized Isothiazoles
作者:Rui Li、Kai Wei、Wen Chen、Liang Li、Hongbin Zhang
DOI:10.1021/acs.orglett.1c03994
日期:2022.1.14
this paper, we report a new process for the construction of 3,4,5-substituted isothiazoles via reaction cascades including Pummerer-like rearrangement, nucleophilic condensation, and sulfenamide cyclization followed by concomitant elimination and dehydration under mild reaction conditions. This process provides isothiazoles bearing fluorine and other functional groups in good to excellent yields from
Herein, we report a new process for the synthesis of highlyfunctionalizedpyridines based on a tandem Pummerer-type rearrangement, aza-Prins cyclization, and elimination-induced aromatization. This formal [5+1] cyclization provides pyridines in good yields with easily accessible starting materials. The synthetic potential of our new method is further demonstrated in the modification of the frameworks
作者:Austin D. Marchese、Louise Kersting、Mark Lautens
DOI:10.1021/acs.orglett.9b02797
日期:2019.9.6
A scalable, diastereoselective nickel-catalyzed carboiodination reaction is reported that avoids metal-based reducing agents. Novel anti-dihydroquinolones and previously unreported tetrahydroquinolines are now readily prepared. The generation of anti-dihydroquinolones is noteworthy, as this selectivity is opposite to that of the Pd variant. Mechanistic insight into the nature of the nickel-catalyzed
<i>Z</i>-Stereoselective Aza-Peterson Olefinations with Bis(trimethylsilane) Reagents and Sulfinyl Imines
作者:Manas Das、Donal F. O’Shea
DOI:10.1021/acs.orglett.5b03519
日期:2016.1.15
Highlystereoselective aza-Peterson olefinations from bench-stable α,α-bis(trimethylsilyl)toluene reagents and N-substituted imines have been achieved using TMSO–/Bu4N+ as Lewis base activator in THF. Remarkably, and for the first time, N-t-butanesulfinyl imines were utilized for the synthesis of Z-stilbenes with excellent selectivities, while N-aryl imines generated E-stilbenes under identical reaction