A One-Pot Reaction of α-Imino Rhodium Carbenoids and Halohydrins: Access to 2,6-Substituted Dihydro-2<i>H</i>-1,4-oxazines
作者:Kieran D. Jones、Michael J. Nutt、Elena Comninos、Alexandre N. Sobolev、Stephen A. Moggach、Tomoya Miura、Masahiro Murakami、Scott G. Stewart
DOI:10.1021/acs.orglett.0c00947
日期:2020.5.1
a Rh(II)-catalyzed reaction between 1-tosyl-1,2,3-triazoles and halohydrins to provide 2,6-substituted 3,4-dihydro-2H-1,4-oxazines under basic conditions. The reaction is proposed to undergo a rhodium carbenoid 1,3-insertion into O-H followed by an annulation. The scope includes phenyl or alkenyl C4-substituted triazoles and a range of halohydrins using catalytic Rh2Oct4 and K2CO3. A synthesis of the
在此,我们报道了 Rh(II) 催化的 1-tosyl-1,2,3-triazoles 和卤代醇在碱性条件下生成 2,6-取代的 3,4-dihydro-2H-1,4-oxazines 的反应。建议该反应进行铑类碳烯 1,3-插入 OH,然后进行环化。范围包括苯基或烯基 C4 取代的三唑和一系列使用催化 Rh2Oct4 和 K2CO3 的卤代醇。还报道了使用这种新方法合成抗菌天然产物 (±)-chelonin C。