[EN] INTRAMOLECULAR CYCLIZATION FOR GENERAL SYNTHESIS OF BICYCLIC ALKYL BIOISOSTERE BORONATES [FR] CYCLISATION INTRAMOLÉCULAIRE POUR LA SYNTHÈSE GÉNÉRALE DE BORONATES D'ALKYLE BICYCLIQUES
Through-space interactions of double bonds by photoelectron spectroscopy
作者:Joseph B. Lambert、Liang. Xue、Richard J. Bosch、Kalulu M. Taba、Dale E. Marko、Shigeyuki. Urano、Pierre R. LeBreton
DOI:10.1021/ja00284a022
日期:1986.11
to the exocyclic doublebond. The NMR, UPS, and ab initio results provide an initial understanding of the three dimensionality of the n-electron steric effects. Nuclear magnetic resonance studies have shown that the doublebond interacts in a complex fashion with remote polar substituents.,-* A 3-axial substituent in a six-membered ring is more repulsive with an exocyclic doublebond than with a saturated
双键和远程极性取代基之间的空间效应,以前在核磁共振 (NMR) 光谱中表现出来,在紫外光电子光谱 (UPS) 中也很明显。通过缩醛基团(二甲基和亚乙基)在外型亚甲基环己烷的 3 轴位置引入醚官能团。3-轴醚基团通过空间相互作用使双键上的 7r 轨道不稳定 0.1-0.2 eV(3-赤道醚基团本身几乎没有影响或没有影响)。这种相互作用显然是 NMR 光谱观察到的 3-轴甲氧基比例降低的原因。相比之下,环己烯中的 4-轴醚官能团通过键电子撤回显示出 n 轨道的轻微稳定。这些结果也与核磁共振观察一致,因为环己烯的环内双键允许更大比例的 4-轴甲氧基。Ab initio 计算通过平行观察到的 r 轨道能量和提供电子密度来支持观察。尽管 3-轴甲氧基明显极化亚甲基环己烷中的双键,但 4-轴甲氧基对环己烯的电子密度几乎没有影响或没有影响,即使甲氧基更接近环内双键而不是环外双键。NMR、UPS 和 ab
[EN] INTRAMOLECULAR CYCLIZATION FOR GENERAL SYNTHESIS OF BICYCLIC ALKYL BIOISOSTERE BORONATES<br/>[FR] CYCLISATION INTRAMOLÉCULAIRE POUR LA SYNTHÈSE GÉNÉRALE DE BORONATES D'ALKYLE BICYCLIQUES
申请人:UNIV TEXAS
公开号:WO2022170218A1
公开(公告)日:2022-08-11
Disclosed herein are methods of synthesizing compounds of the formula (I) wherein the variables are defined herein. Also provided are compounds produced using these methods. In some aspects, the methods provided herein may be used to install aryl bioisosteres.