DMAP-Catalyzed [3 + 2] and [4 + 2] Cycloaddition Reactions between [60]Fullerene and Unmodified Morita–Baylis–Hillman Adducts in the Presence of Ac<sub>2</sub>O
作者:Hai-Tao Yang、Wen-Long Ren、Chun-Bao Miao、Chun-Ping Dong、Yang Yang、Hai-Tao Xi、Qi Meng、Yan Jiang、Xiao-Qiang Sun
DOI:10.1021/jo3025797
日期:2013.2.1
One-step DMAP-catalyzed [3 + 2] and [4 + 2] cycloaddition reactions between C60 and unmodified Morita–Baylis–Hillman adducts in the presence of Ac2O have been developed for the easy preparation of cyclopentene- and cyclohexene-fused [60]fullerene derivatives. When the MBH adducts bear an alkyl group, two different reaction pathways could be controlled selectively depending on the conditions.
作者:Hyunah Choo、Youhoon Chong、Kwang-Su Park、Jinyoung Kim
DOI:10.1055/s-2007-968032
日期:2007.2
The Baylis-Hillman reaction was greatly accelerated by use of octanol as an additive. Under the octanol-accelerated Baylis-Hillman conditions, unactivated aldehydes such as aliphatic aldehydes and aromatic aldehydes with electron-withdrawing substituents were readily converted into the desired products in good to high yields.
Unsaturated sulfinamides II1. An efficient preparation of 4-(2'-alkenesulfinyl)-morpholines by the reaction of 4-morpholinesulfenyl chloride with allylic alcohols
作者:Jean-Bernard Baudin、Sylvestre A Julia
DOI:10.1016/0040-4039(88)85134-7
日期:1988.1
By the title reaction carried out in the presence of triethylamine, several allylic alcohols have been converted via the transient 4-morpholinesulfenate esters Id into 4-(2'-alkenesulfinyl)-morpholines 2.
commonly known nucleophile, is identified as the catalytic active species. This zwitterion favors nucleophiliccharacter in solution, whereas once confined within the framework, it becomes an electrophile yielding Aldol-Tishchenko selectivity. Computational investigations reveal a structural change in the phosphonium moiety induced by the steric confinement of the framework that makes it accessible and an
Facile synthesis of biarylmethanes and tetrasubstituted arenes <i>via</i> a base-mediated [3 + 3] benzannulation reaction of Morita–Baylis–Hillman adducts and unsaturated sulfones
作者:Deepak Yadav、Sunil K. Sharma、Rajeev S. Menon
DOI:10.1039/c9ob00214f
日期:——
A facile DBU-mediated [3 + 3] benzannulation reaction of 1,3-bis-sulfonyl propenes and Morita–Baylis–Hillman (MBH) bromides is described. The benzannulation reaction afforded bis-sulfonyl biarylmethanes/arenes with complete regioselectivity. The products may be converted readily into corresponding benzophenones via site-selective benzylic oxidation.