The annulation of phthalides with α-alkyl/arylacrylates in the presence of LDA/LHMDS is shown to directly give alkyl/aryl-1-naphthols. The method involving a novel dealkoxycarbonylation obviates the regiochemical issues in the synthesis of polysubstituted naphthalenes, and it forms the key step in a three-step total synthesis of arnottin I, a naphthobenzopyranone natural product.
Extending human perception of electromagnetic radiation to the UV region through biologically inspired photochromic fuzzy logic (BIPFUL) systems
作者:Pier Luigi Gentili、Amanda L. Rightler、B. Mark Heron、Christopher D. Gabbutt
DOI:10.1039/c5cc09290f
日期:——
Biologically inspired fuzzy logic systems allow us to detect and discern UV frequencies.
生物启发的模糊逻辑系统使我们能够检测和区分紫外频率。
NAPHTHALENE-CONTAINING POLYMERS AND METHODS OF MAKING THE SAME
申请人:Alliance for Sustainable Energy, LLC
公开号:US20180208716A1
公开(公告)日:2018-07-26
The present disclosure relates to a dimer that includes a first hydroxyl-functionalized naphthalene group and a second hydroxyl-functionalized naphthalene group, where the first hydroxyl-functionalized naphthalene group and the second hydroxyl-functionalized naphthalene group are connected by a bridging group. The present disclosure also relates to a polymer synthesized using the dimer, as well as methods for synthesizing both the dimer and the polymer.
A process for producing a cyclic and/or linear phosphonitrilic acid ester from a cyclic and/or linear phosphonitrile dichloride is provided, wherein the reaction time is shorter and the content of monochloro phosphazenes is very small.
When phosphonitrile dichloride is reacted with a metal arylolate and/or a metal alcoholate in the presence of a reaction solvent, a metal arylolate and/or a metal alcoholate composed of at least two different metals having different ionization energies is used and also a specific compound is used as a catalyst.
A combination of PhICl2 and Pb(SCN)2 is effective for the p-selective thiocyanation of various types of p-unsubstituted phenols and naphthols 1 to give p-thiocyanatophenols and naphthols 3. The reaction proceeded at 0°C to room temperature in good to quantitative yields. Twenty-five examples are given, in which various functional groups, such as chloro, allyl, carbonyl, ester, amide, and primary hydroxyl groups, are shown to be compatible with this reaction.