The Regiochemistry of the o-Claisen Rearrangement of Bis-(alloxy)polycyclic Aromatics
摘要:
The o-Claisen rearrangement of bis-(allyloxy) naphthalenes, anthracenes and phenanthrenes is regiospecific and is consistent with resonance theory and molecular orbital calculations.
Nicholas Reactions in the Construction of Cyclohepta[<i>de</i>]naphthalenes and Cyclohepta[<i>de</i>]naphthalenones. The Total Synthesis of Microstegiol
作者:Rafiq A. Taj、James R. Green
DOI:10.1021/jo102127q
日期:2010.12.3
construction of cyclohepta[de]naphthalenes by way of ring closing metathesis and intramolecular Friedel−Crafts reactions, respectively, is described. Deprotection of the C-7 oxygen function to the corresponding naphthol allows tautomerization to cyclohepta[de]naphthalene-1-ones upon seven-membered-ring closure in most cases, and replacement of the C-2 oxygen function in the naphthalene by a methyl group ultimately
2,7-二氧化萘的尼古拉斯反应化学在环庚的合成[应用德]萘并在合成(±)-microstegiol(1)的设计。据报道,尼古拉斯单取代(主要为C-1)的取代特征和2,7-二加氧萘的解离反应(主要为1,6-)。1,8- dicondensation产物和应用选择的C-1 monocondensation产品环庚的构造[ DE ]通过闭环复分解的和分子内Friedel-Crafts反应方式萘,分别进行说明。在C-7氧功能为相应的萘酚的脱保护可以互变异构化至环庚[日在大多数情况下,在七元环闭合时]]萘-1-酮以及用甲基取代萘中的C-2氧官能团最终可以合成(±)-微甜菊醇。
Cyclohepta[<i>de</i>]naphthalenes and the Rearranged
Abietane Framework of Microstegiol via Nicholas Reaction Chemistry
作者:James Green、Rafiq Taj、Anusha Abhayawardhana
DOI:10.1055/s-0028-1087521
日期:——
Nicholas reactions on 2,7-dioxygenated naphthalenes give C-1monosubstitution and C-1/C-8 disubstitution in most -cases.From γ-carbonyl cation monocondensation product 3B or alkyne-unsubstituted dicondensationproduct 4A, cyclohepta[ DE]naphthalenes bearing no substituents, GEM-dimethyl substituents, and a ketonefunction, and the rearranged abietane framework of microstegiolmay be prepared.
Naphthalene-Based Calixarenes: Unusual Regiochemistry of a Friedel−Crafts Alkylation
作者:Berkeley J. Shorthill、Timothy E. Glass
DOI:10.1021/ol006980+
日期:2001.2.1
[GRAPHICS]In the pursuit of naphthalene based calixarenes, a Friedel-Crafts alkylation with unusual regiochemistry was observed. Treatment of carbinol 14 with catalytic triflic acid was expected to produce calixarenes of the class represented by 16. Instead, the major product was cyclic trimer 15, in which alkylation of each naphthalene ring occurred at the electronically deactivated position. The structure of compound 15 was assigned by 2-D NMR studies.
The Regiochemistry of the o-Claisen Rearrangement of Bis-(alloxy)polycyclic Aromatics
作者:George Majetich、Jianhua Yu、Yang Li、Scott H. Allen
DOI:10.3987/com-06-s(k)36
日期:——
The o-Claisen rearrangement of bis-(allyloxy) naphthalenes, anthracenes and phenanthrenes is regiospecific and is consistent with resonance theory and molecular orbital calculations.
Synthesis of 3,5- and 3,6-Linked Calix[<i>n</i>]naphthalenes
作者:Berkeley J. Shorthill、Robert G. Granucci、Douglas R. Powell、Timothy E. Glass
DOI:10.1021/jo0161173
日期:2002.2.1
The preparation of calix[n]naphthalenes fromderivatives of 2,7-dihydroxynaphthalene is described. 1,8-Dialkyl substitution is used to direct the regiochemistry of the acid-catalyzed condensation reactions. Acyclic peri substituents lead to a 3,5-linked calix[3]naphthalene, whereas cyclic peri substituents give predominantly a calix[5]naphthalene with the corresponding 3,6-linkage. The 3,6-linked calix[4]naphthalene