金属卟啉(和卟啉)是众所周知的自然界生命色素,因为该组的代表包括叶绿素(镁卟啉)和血红素(铁卟啉)。因此,基于这些物质的化学构建可以基于对生物系统的模仿。受大自然的启发,在本文中我们介绍了五种不同卟啉的制备方法,即内消旋四苯基卟啉( TPP )、内消旋四(对茴香基)卟啉( T p AP )、内消旋四(对磺基苯基)卟啉四钠( TST) p SPP )、内消旋-四(间羟基苯基)卟啉 ( T m HPP ) 和内消旋-四(间羧基苯基)卟啉 ( T m CPP ) 以及它们的N-钳形 Pd(II) 配合物,例如 Pd (II)-内消旋-四苯基卟啉 ( PdTPP )、Pd(II)-内消旋-四(对茴香基)卟啉 ( PdT p AP )、Pd(II)-内消旋-四(对磺基苯基)卟啉四钠 ( PdTST p SPP )、Pd(II)-内消旋-四(间羟基苯基)卟啉( PdT m HPP )和Pd(II)-内消旋-四(间羧苯基)卟啉(
<sup>1</sup>
H, <sup>13</sup>
C, <sup>19</sup>
F and <sup>11</sup>
B NMR spectral reference data of some potassium organotrifluoroborates
作者:Roberta A. Oliveira、Ricardo O. Silva、Gary A. Molander、Paulo H. Menezes
DOI:10.1002/mrc.2467
日期:2009.10
Complete (1)H, (13)C, (19)F and (11)BNMRspectraldata for 28 potassiumorganotrifluoroborates are described. The resonance for the carbon bearing the boron atom is described for most of the studied compounds. A modified (11)BNMR pulse sequence was used and better resolution was observed allowing the observation of (11)B-(19)F coupling constants for some of the studied compounds.
Efficient Hydrolysis of Organotrifluoroborates via Silica Gel and Water
作者:Gary A. Molander、Livia N. Cavalcanti、Belgin Canturk、Po-Shen Pan、Lauren E. Kennedy
DOI:10.1021/jo901441u
日期:2009.10.2
and efficient method for the hydrolysis of organotrifluoroborates to unveil boronic acids using silicagel and H2O was developed. This method proved to be tolerant of a broad range of aryl-, heteroaryl-, alkenyl-, and alkyltrifluoroborates as well as structurally diverse aminomethylated organotrifluoroborates. As anticipated, electron-rich substrates provided the corresponding boronic acids more readily
开发了一种使用硅胶和 H 2 O水解有机三氟硼酸盐以揭示硼酸的通用、温和且有效的方法。事实证明,该方法可以耐受各种芳基-、杂芳基-、烯基-和烷基三氟硼酸盐以及结构多样的氨甲基化有机三氟硼酸盐。正如预期的那样,由于共振稳定的二氟硼烷中间体,富电子底物比缺电子底物更容易提供相应的硼酸。开发的方法进一步扩展用于将有机三氟硼酸盐转化为相应的硼酸酯。
Oxidative Condensations To Form Benzimidazole-Substituted Potassium Organotrifluoroborates
作者:Gary A. Molander、Kehinde Ajayi
DOI:10.1021/ol301956p
日期:2012.8.17
benzimidazole-substituted potassium organotrifluoroborates was prepared via the condensation of various potassium formyl-substituted aryl- and heteroaryltrifluoroborates with aromatic 1,2-diamines under oxidative conditions. The efficient Suzuki–Miyaura cross-coupling of products thus formed to various aryl and heteroaryl bromides was achieved in good yields. The method allows the facile preparation of benzimidazole-containing
Arylation and Heteroarylation of Thienylsulfonamides with Organotrifluoroborates
作者:Mnaza Noreen、Nasir Rasool、Mirna El Khatib、Gary A. Molander
DOI:10.1021/jo501323z
日期:2014.8.1
the Suzuki cross-coupling of unprotected thienylsulfonamides from air- and bench-stable organotrifluoroborates in the absence of a protecting group on the sulfonamide nitrogen. The developed synthetic method can be applied to the preparation of various arylated and heteroarylated thienylsulfonamides underconditions that are tolerant of a broad range of functional groups.
The Facile and Direct Formylation of Organoboron Aromatic Compounds with Benzodithiolylium Tetrafluoroborate
作者:Diego Petruzziello、Andrea Gualandi、Hamza Giaffar、Veronica Lopez-Carrillo、Pier Giorgio Cozzi
DOI:10.1002/ejoc.201300529
日期:2013.8
Organoboron compounds can be used to effect a direct formylation in the absence of transition metals. We report that the direct reaction between boronic derivatives and benzodithiolylium tetrafluoroborate, a commercially available carbenium ionic compound, is possible and provides access to many interesting compounds without the use of transition metals. The direct reaction of the carbenium ion with