Synthesis and antihistaminic activity of 3H-benzo [4,5] thieno [2,3-d][1,2,3] triazin-4-ones
β Scribed by Gollapalle L. Viswanatha; B. Janaki Priyadarshini; Nandakumar Krishnadas; Saravanan Janardhanan; Srinath Rangappa; Shylaja Hanumanthappa
- Book ID
- 116700995
- Publisher
- Elsevier
- Year
- 2012
- Tongue
- English
- Weight
- 786 KB
- Volume
- 20
- Category
- Article
- ISSN
- 1319-0164
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## Abstract magnified image An efficient oneβpot access for the synthesis of the previously unreported tetracyclic fused pyrimidoβ[4β³,5β³:4β²,5β²]thieno[3β²,2β²:4,5]thieno[3,2β__d__]pyrimidine (**3**) and 1,2,3βtriazine[4β³,5β³:4β²,5β²]thienoβ[3β²,2β²:4,5]thienoβ[3,2β__d__]β1,2,3βtriazine (**5**) heteroaroma
## Abstract Four previously unknown polycyclic heterocyclic ring systems, namely, benzo[__h__]thieno[3β²,2β²:4,5]βthieno[2,3β__c__]quinoline (6), benzo[__h__]thieno[3β²,2β²:4,5]thieno[2,3β__c__]quinoline (11), benzo[__f__]thienoβ[3β²,2β²:4,5]thieno[2,3β__c__]tetrazolo[1,5β__a__]quinoline (12) and benzo[_