An Improved Synthesis of Dibenzoxanthene

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Improved Synthesis of Vasicinone

A new, high yielding method for the preparation of vasicinone (7) is described. Reaction of 2-nitrobenzoic acid with N, N¢-carbonyldiimidazole followed by 2-pyrrolidinone gave 1-(2-nitrobenzoyl)pyrrolidine-2-one (3). Reduction of the latter with 10% Pd-C afforded deoxyvasicinone (4). Reaction of deoxyvasicinone (4) with bromine yielded monobromo-deoxyvasicinone (5). Exchange of bro...

متن کامل

An improved synthesis of octaethylporphyrin.

Octaethylporphyrin (OEP, 1) is, by reason of its symmetry, high solubility, and stability, one of the more important and widely used models for the study of porphyrin chemistry. In the past, its synthesis has been tedious and erratic, particularly whenever more than a few grams were required. The usual syntheses, those of Inoffen et al. l and of Whitlock and Hanauer2 (based on earlier work of E...

متن کامل

An Improved Synthesis of Homocitrate

Monoethyl malonate (1) and tert-butyl alcohol are esterified by catalysis with dicyclohexylcarbodiimide and 4-dimethylaminopyridine to yield ethyl t-butyl malonate (2). The ethoxymagnesio derivative (3) of the ester is condensed with β-carbomethoxypropionyl chloride to give the triester (4), which is decomposed by heating under vacuum in the presence of β-naphthalensulfonic acid to give ethyl m...

متن کامل

improved synthesis of vasicinone

a new, high yielding method for the preparation of vasicinone (7) is described. reaction of 2-nitrobenzoic acid with n, n¢-carbonyldiimidazole followed by 2-pyrrolidinone gave 1-(2-nitrobenzoyl)pyrrolidine-2-one (3). reduction of the latter with 10% pd-c afforded deoxyvasicinone (4). reaction of deoxyvasicinone (4) with bromine yielded monobromo-deoxyvasicinone (5). exchange of bromine of 5 wit...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Bulletin of the Chemical Society of Japan

سال: 1976

ISSN: 0009-2673,1348-0634

DOI: 10.1246/bcsj.49.1167