Synthesis and Characterization of "Picnic-Basket" Porphyrins with a Substituent in the Interior of the Pocket.
作者:Takashi MICHIDA、Masahiro KYUHARA、Michiko NISHIYAMA、Yukihiro YOSHIMI、Jeffrey P. FITZGERALD、Hiroteru SAYO
DOI:10.1248/cpb.40.3157
日期:——
"Picnic-basket" porphyrins of a new type, that have a substituent in the interior of the pocket, were synthesized to study stabilization of the bound oxygen in hemoprotein models. Though these Co(II) porphyrins have enormous equilibrium constants for the formation of base adducts, hydrogen-bonding interaction with coordinated dioxygen is not as effective for stabilization of the metal-dioxygen bond as we had expected. The results suggest that doming of the porphyrin plane plays an important role in the binding of dioxygen.
合成了一种新型的“野餐篮”类卟啉,其内部口袋中有一个取代基,用于研究结合氧在血红蛋白模型中的稳定性。尽管这些Co(II)卟啉在形成碱性加合物方面具有巨大的平衡常数,但与配位的二氧化氧的氢键相互作用并没有像我们预期的那样有效地稳定金属-二氧化氧键。结果表明,卟啉平面的弧形变形在二氧化氧的结合中起着重要作用。