Oxetan-3-ols as 1,2-bis-Electrophiles in a Brønsted-Acid-Catalyzed Synthesis of 1,4-Dioxanes
作者:Juan J. Rojas、Elena Torrisi、Maryne A. J. Dubois、Riashat Hossain、Andrew J. P. White、Giovanni Zappia、James J. Mousseau、Chulho Choi、James A. Bull
DOI:10.1021/acs.orglett.2c00568
日期:2022.4.1
that combine diacceptors with bis-nucleophiles are uncommon. Here, we report the synthesis of 1,4-dioxanes from 3-aryloxetan-3-ols, as 1,2-bis-electrophiles and 1,2-diols. Brønstedacid Tf2NH catalyzes both the selective activation of the oxetanol, to form an oxetane carbocation that reacts with the diol, and intramolecular ring opening of the oxetane. High regio- and diastereoselectivity are achieved
Synthesis of oxetane and azetidine ethers as ester isosteres by Brønsted acid catalysed alkylation of alcohols with 3-aryl-oxetanols and 3-aryl-azetidinols
作者:Peerawat Saejong、Juan J. Rojas、Camille Denis、Andrew J. P. White、Anne Sophie Voisin-Chiret、Chulho Choi、James A. Bull
DOI:10.1039/d3ob00731f
日期:——
Oxetanes and azetidines continue to draw significant interest in medicinal chemistry, as small, polar and non-planar motifs. Oxetanes also represent interesting surrogates for carbonyl-containing functional groups. Here we report a synthesis of 3,3-disubstituted oxetane- and azetidine-ethers, with comparisons made to the ester functional group. The tertiary benzylic alcohols of the 4-membered rings
Visible Light Photoredox-Catalyzed Decarboxylative Alkylation of 3-Aryl-Oxetanes and Azetidines via Benzylic Tertiary Radicals and Implications of Benzylic Radical Stability
作者:Maryne A. J. Dubois、Juan J. Rojas、Alistair J. Sterling、Hannah C. Broderick、Milo A. Smith、Andrew J. P. White、Philip W. Miller、Chulho Choi、James J. Mousseau、Fernanda Duarte、James A. Bull
DOI:10.1021/acs.joc.3c00083
日期:——
3-aryl-3-alkyl substituted derivatives and assesses the influence of ring strain and heterosubstitution on the reactivity of small-ring radicals. 3-Aryl-3-carboxylic acid oxetanes and azetidines are suitable precursors to tertiary benzylic oxetane/azetidine radicals which undergo conjugate addition into activated alkenes. We compare the reactivity of oxetane radicals to other benzylicsystems. Computational
In(OTf)<sub>3</sub>-Catalyzed Synthesis of 2,3-Dihydro-1<i>H</i>-benzo[<i>e</i>]indoles and 2,3-Dihydrobenzofurans via [3 + 2] Annulation
作者:Shuxuan Liu、Yu Zang、Hai Huang、Jianwei Sun
DOI:10.1021/acs.orglett.0c02729
日期:2020.11.6
An In(OTf)3-catalyzed intermolecular [3 + 2] annulation for the synthesis of 2,3-dihydro-1H-benzo[e]indoles and 2,3-dihydrobenzofurans from readily available substrates has been achieved. This approach takes advantage of oxetane and para-quinone methide as important functional units in the key intermediate. β-Naphthylamines and phenols have been demonstrated as excellent reaction partners.
已实现了一种由In(OTf)3催化的分子间[3 + 2]环合反应,用于从易于获得的底物中合成2,3-二氢-1 H-苯并[ e ]吲哚和2,3-二氢苯并呋喃。该方法利用氧杂环丁烷和对苯二甲酰甲烷作为关键中间体中的重要功能单元。β-萘胺和苯酚已被证明是极好的反应伴侣。