在这项工作中,将磁化水用作绿色促进介质,用于无催化剂,一锅,实用,高效,环境友好的四氢苯并[ b ]吡喃多组分合成 。一些四氢苯并[ b 通过在室温下醛,丙二腈和1,3-环己二酮或5,5-二甲基-1,3-环己二酮的三组分反应合成对吡喃衍生物。该方法具有反应时间短,成本低,定量收率,后处理简单,不需要有机溶剂的优点。因此它是环境经济的,不会产生危险废物。该系统的分子洞察力表明,磁化水对所有有机试剂之间的相互作用强度具有显着影响,并且按水与每种有机试剂之间氢键数量的顺序增加了1.2倍。在存在磁化水的情况下,试剂在模拟箱的中央更加冷凝,
An efficient one-pot synthesis of functionalized 2-amino-4H-pyrans by a meglumine-catalyzed three-component reaction has been developed. A broad range of substrates including aromatic and heteroaromatic aldehydes, isatin derivatives, and acenaphthenequinone are condensed with enolizable C-H activated compounds and alkylmalonates to give the desired products in high to excellent yields. This methodology provides an alternative approach for rapid access to construct a diversity-oriented library of 4H-pyrans.
10.3184/030823410x12891568367823
作者:Patra, Amarendra、Mahapatra, Tanusri
DOI:10.3184/030823410x12891568367823
日期:——
Cerium(III) Chloride–Catalyzed One-Pot Synthesis of Tetrahydrobenzo[<i>b</i>]pyrans
作者:Gowravaram Sabitha、K. Arundhathi、K. Sudhakar、B. S. Sastry、J. S. Yadav
DOI:10.1080/00397910802378399
日期:2009.1.13
Efficient one-pot synthesis of 4H-benzo[b]pyrans via a three-component cyclocondensation of aryl aldehydes, malononitrile, and dimedone has been reported using CeCl3 center dot 7H(2)O as catalyst.
Lithium Bromide as a Mild, Efficient, and Recyclable Catalyst for the One-Pot Synthesis of Tetrahydro-4<i>H</i>-Chromene Derivatives in Aqueous Media
A simple, efficient, one-pot method has been developed for the synthesis of tetrahydro-4H-chromene derivatives by concurrent reaction of aryl aldehydes, active methylene compounds, and 1,3-cyclohexanedins using a catalytic amount of lithium bromide in aqueous media. The present approach offers several advantages such as shorter reaction times, good yields, low cost, recycling of the catalyst, and simple workup.
Catalyst-free green synthesis of tetrahydro-benzo[b]pyrans in magnetized water: experimental aspects and molecular dynamics simulation
for an organic solvent. It is thus enviro-economic with no dangerous wastes produced. The molecular insight on the system shows that magnetized water has a dramatic effect on the strength of the interactions between all organic reagents as well as an increase of a factor of 1.2 in order of the number of hydrogen bonds between water and each organic reagent. In the presence of magnetized water, the reagents
在这项工作中,将磁化水用作绿色促进介质,用于无催化剂,一锅,实用,高效,环境友好的四氢苯并[ b ]吡喃多组分合成 。一些四氢苯并[ b 通过在室温下醛,丙二腈和1,3-环己二酮或5,5-二甲基-1,3-环己二酮的三组分反应合成对吡喃衍生物。该方法具有反应时间短,成本低,定量收率,后处理简单,不需要有机溶剂的优点。因此它是环境经济的,不会产生危险废物。该系统的分子洞察力表明,磁化水对所有有机试剂之间的相互作用强度具有显着影响,并且按水与每种有机试剂之间氢键数量的顺序增加了1.2倍。在存在磁化水的情况下,试剂在模拟箱的中央更加冷凝,