The regioselectivity of the lithiation of
1,4,5,8-tetramethoxynaphthalene-2-carbaldehyde (7) with butyllithium or
phenyllithium in the presence of
N,N,N′-trimethylethylenediamine
and the subsequent bromination of the lithiated species so generated with
1,2-dibromotetrafluoroethane were investigated. Similar investigations with
butyllithium as base in the presence of
N,N,N′,N′-tetramethylethylenediamine
or potassium t-butoxide were carried out on
1,4,5,8-tetramethoxynaphthalene-2-methanol (14). These studies were extended
to 1,5,8-trimethoxynaphthalene-3-methanol (25), 3-methoxybenzenemethanol (29)
and 3,5-dimethoxybenzenemethanol (32). The X-ray crystal structure of
6-bromo-1,4,5,8-tetramethoxynaphthalene-2-methanol (17) is described.
1,4,5,8-四甲氧基萘-2-甲醛(7)与丁基锂或
1,4,5,8-四甲氧基萘-2-甲醛 (7) 与丁基锂或
的存在下,1,4,5,8-四甲氧基萘-2-甲醛(7)与丁锂或
N,N,N′-三甲基乙二胺
并将生成的锂化物与
1,2-二溴四氟乙烷进行溴化。以
以丁基锂为碱,在
N,N,N′,N′-四甲基乙二胺
或叔丁醇钾对
1,4,5,8-四甲氧基萘-2-甲醇 (14)。这些研究
1,5,8-三甲氧基萘-3-甲醇 (25)、3-甲氧基苯甲醇 (29)
和 3,5-二甲氧基苯甲醇 (32)。的 X 射线晶体结构。
描述了 6-溴-1,4,5,8-四甲氧基萘-2-甲醇(17)的 X 射线晶体结构。