Phosphomolybdicacid (PMA)–SiO2 was found to be an efficient catalyst for the three‐component condensation reaction of phthalhydrazide, 1,3‐diketone, and aldehydes to produce 2H‐indazolo[1,2‐b]phthalazine‐triones in excellent yields. The catalyst can be recovered and reused without significant loss of activity.
磷钼酸(PMA)-SiO 2被发现是邻苯二甲酰肼,1,3-二酮和醛的三组分缩合反应产生2 H-吲唑并[1,2 - b ]邻苯二甲腈-三酮的有效催化剂。优异的产量。催化剂可被回收和再利用而没有明显的活性损失。
Silica-supported tungstic acid (STA): A recyclable catalyst for the synthesis of <i>1H</i>-indazolo [1,2-<i>b</i>]phthalazine-trione and spiro-triazolo[1,2-<i>a</i>]indazole-tetraone derivatives under solvent-free condition
Abstract An efficient one-pot synthesis of 1 H-indazolo[1,2-b]phthalazine-trione and spiro-triazolo[1,2-a]indazole-tetraone derivatives via three-component condensation reaction of phthalhydrazide or 4-phenylurazole, aldehydes or isatins and dimedone in the presence of a catalytic amount of silica-supported tungstic acid (STA), as a heterogeneous solid acid catalyst under solvent-free conditions is
Pentaerythritol as efficient H-bonding organocatalyst for synthesis of indazolo[2,1-b]phthalazine-trione derivatives
作者:Shohreh Farahmand、Roya Ayazi-Nasrabadi、Mohammad Mokhlesi、Mohammad Ali Zolfigol
DOI:10.1007/s11164-019-03821-4
日期:2019.7
Pentaerythritol was applied as an effective, biodegradable, nontoxic, mild, and commercially available H-bonding organocatalyst for synthesis of indazolo[2,1-b]phthalazine-trione derivatives via one-potthree-component condensation of aromatic aldehydes, phthalhydrazide, and dimedone under thermal solvent-free conditions in high to excellent yield.
季戊四醇被用作一种有效,可生物降解,无毒,温和且可商购的氢键有机催化剂,用于通过芳族醛,邻苯二甲酰肼和三乙胺的一锅三组分缩合反应合成吲哚并[2,1 - b ]邻苯二嗪三酮衍生物。在无热溶剂的条件下,二甲酮的产率高至优异。
Solvent free, Ni-nanoparticle catalyzed greener synthesis and photophysical studies of novel 2H-indazolo[2,1-b] phthalazine-trione derivatives
作者:Mithu Saha、Smritakshi Phukan、Ramen Jamatia、Sivprasad Mitra、Amarta Kumar Pal
DOI:10.1039/c2ra22396a
日期:——
A nickel nanoparticle (NPs) catalyzed one-pot three component reaction of phthalhydrazide, dimedone and aryl aldehydes under solvent free conditions has been reported. The present approach offers the advantages of simple methodology, clean and mild reaction conditions, short reaction time, low environmental impact, high yield, and excellent purity. The synthesized compounds (2H-indazolo[2,1-b] phthalazine-trione) are found to be suitable candidates for efficient fluorogenic assays to monitor bio-chemical environments.
Nano-ferrite supported glutathione as a reusable nano-organocatalyst for the synthesis of phthalazine-trione and dione derivatives under solvent-free conditions
作者:Binoyargha Dam、Mithu Saha、Ramen Jamatia、Amarta Kumar Pal
DOI:10.1039/c6ra06376d
日期:——
time from easily accessible starting materials under solvent-free conditions. This methodology showed very good substrate scope and high degree of tolerance for a variety of aldehydes (including aliphatic and heteroaromatic aldehydes) and activemethylenecompounds. Moreover, the catalyst can be easily separated from the reaction mixture because of its highly paramagnetic nature, by using an external