通过修饰的Sanford反应制备10-羟基苯并[ h ]喹啉家族的类似物及其激发态的分子内质子转移性质
摘要:
我们已经开发出一种高度优化的方法,该方法可以对空间和电子上要求较高的苯并[ h ]喹啉类似物进行氧化乙酰氧基化。通过检查各种反应参数(溶剂,氧化剂,催化剂,温度,时间),确定了OAc基团插入的最佳条件。确定的条件(Pd(OAc)2,PhI(OAc)2,MeCN,150°C,16 h),再加上乙酸酯的水解,导致羟基苯并喹啉的形成,产率为27-59%,而所有先前发表的方法均无效。该合成与各种功能(酯,醛,碳-碳三键)兼容,最重要的是,它可用于位阻类似物以及在各个位置具有给电子和吸电子取代基的化合物。所有获得的化合物均表现出激发态的分子内质子转移(ESIPT),表现为较小的荧光量子产率和较大的斯托克斯位移(8300–9660 cm –1)。八个10-羟基苯并[ h的结构变化的影响对]喹啉类似物的吸收和发射性质进行了详细研究。
An efficient and practical method for the synthesis of medicinally important acridines from readily available o-aminoaryl ketones and arylboronic acids was developed using copper(II)-mediated relay reactions that involve intermolecular Chan–Lam cross-coupling and subsequent intramolecular Friedel–Crafts-type reactions. A sole promoter, i.e., Cu(OTf)2, was used; therefore, strongly acidic and basic
A composition of the present invention contains a latent antioxidant (A) and a polymerization initiator (B) including one or more oxime ester compounds represented by General Formula (I) below. It is preferable that the latent antioxidant (A) have a skeleton represented by General Formula (III) below. (See the claims, for the definitions of R1 to R8 and n in General Formula (I) and A, R61, R62, d, and k in General Formula (III).)
Mayer; Freund, Chemische Berichte, 1922, vol. 55, p. 2056
作者:Mayer、Freund
DOI:——
日期:——
144. The chemistry of carcinogenic nitrogen compounds. Part II. Further derivatives of 1 : 2- and 3 : 4-benzacridines
作者:Ng. Ph. Buu-Hoï
DOI:10.1039/jr9490000670
日期:——
Acid-Promoted Intramolecular Decarbonylative Coupling Reactions of Unstrained Ketones: A Modular Approach to Synthesis of Acridines and Diaryl Ketones
作者:Ganesh Kumar Dhandabani、Chia-Ling Shih、Jeh-Jeng Wang
DOI:10.1021/acs.orglett.0c00304
日期:2020.3.6
we reported Lewis acid- or Brønsted acid-promoted intramolecular C(sp2)-C(sp2) bond cleavage and a novel C(sp2)-C(sp2) bond-forming cascade reaction to synthesize the acridine motif. The metal-free oxidation of the alkyne motif generated the in situ ketone group extracted via a decarbonylation reaction. The mechanistic studies revealed that the electrophilic N-iodo species triggered key decarbonylation