中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2'-羟基苯乙酮 | o-hydroxyacetophenone | 118-93-4 | C8H8O2 | 136.15 |
苯并二氢呋喃二酮 | coumarandione | 4732-72-3 | C8H4O3 | 148.118 |
1,2-二(2-羟基苯基)-1,2-乙烷二酮 | 2,2'-dihydroxybenzil | 85-26-7 | C14H10O4 | 242.231 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (2,5-dihydroxy-phenyl)-glyoxylic acid | 10385-70-3 | C8H6O5 | 182.133 |
苯并二氢呋喃二酮 | coumarandione | 4732-72-3 | C8H4O3 | 148.118 |
尿黑酸 | homogentisic acid | 451-13-8 | C8H8O4 | 168.149 |
2-羟基-2-(2-羟基苯基)乙酸 | 2-hydroxymandelic acid | 1678-71-3 | C8H8O4 | 168.149 |
The condensation of 2,3-diaminobenzoic acid and the 5-chloro derivative with o-hydroxyphenylglyoxylic acid, isatin and benzothiophen-2,3-dione in polyphosphoric acid leads to the appropriate tetracycles. Isomeric products are formed from these unsymmetrical diamines, and methods of assigning particular structures are described.