NEW POLYHETEROPOLYCYCLIC RING SYSTEMS PART XXV. SYNTHESIS OF STEROID-TYPE COMPOUNDS DERIVED FROM 5,5-DIMETHYL- 2,3,5,6-TETRAHYDRO-4H-THIOPYRANO [3,2-g]-BENZTHIADIAZOLE-4-ONE
- 1 May 1987
- journal article
- research article
- Published by Taylor & Francis in Phosphorus and Sulfur and the Related Elements
- Vol. 31 (1-2) , 141-145
- https://doi.org/10.1080/03086648708079351
Abstract
The synthesis of the tricyclic ketone, 5,5-dimethyl-2,3,5,6-tetrahydro-4H-thiopyrano[3,2-g] [1,2,3] benzthiadiazole-4-one (V) starting with dimedone is described. V served as the key intermediate for the total synthesis of the hitherto unknown 9,10-dihydro-9,9-dimethyl-5H[1,2,3] thiadiazolo-[4′,5′:4,5] thiopyrano [3,2-g][1,2,3]benzothiadiazole (VIII),1 9,10-dihydro-9,9-dimethyl-5H-isoxazolo[4′,5′:4,5]thio-pyrano[3,2-g][1,2,3]ben-zothiadiazole (IX) and 9,10-dihydro-9,9-dimethyl-8N-phenyl-5H-pyrazolo-[4′,5′ :4,5]thiopyrano[3,2-g]-[1,2,3]benzothiadiazole (X).Keywords
This publication has 9 references indexed in Scilit:
- Novel 1,2,3-thiadiazolyl sulfines from the reaction of N-substituted hydrazones with thionyl chlorideThe Journal of Organic Chemistry, 1984
- Reaction of 2-dimethylaminomethylene-1,3-diones with Dinucleophiles. IV. Synthesis of 5,7-dihydrothiopyrano[3,4-c]pyrazol-4(1H)-ones, 5H-Thiopyrano[4,3-d]isoxazol-4(7H)-one and 6H-Thiopyrano[3,4-d]pyrimidin-5(8H)-onesJournal of Heterocyclic Chemistry, 1984
- POLYHETERO POLYCYCLIC RING SYSTEMS: PART XV: SYNTHESES OF STEROID-TYPE COMPOUNDS DERIVED FROM 1-OXO-4,10-DITHIA-1,2,3,4,9,10-HEXAHYDROPHENANTHRENEPhosphorus and Sulfur and the Related Elements, 1982
- A Review on the Partial and Total Syntheses of ThiasteroidsHETEROCYCLES, 1982
- New heterocyclic ring systems. IX. Polyazadithiasteroid analoguesJournal of Heterocyclic Chemistry, 1979
- Keten dithioacetals. Part 11. Reaction of 3-cyano-4-methylthio-2(1H)-pyridones with hydrazine and guanidine: synthesis of novel substituted and fused pyrazolo[4,3-c]pyridone and pyrido[4,3-d]pyrimidine derivativesJournal of the Chemical Society, Perkin Transactions 1, 1978
- 6‐Azasteroidal analogues from α‐hydroxymethylene ketonesJournal of Heterocyclic Chemistry, 1974
- Synthesis of cyclic 2-enones from cyclic 1,3-diketonesThe Journal of Organic Chemistry, 1973
- On Acylhydrazones and 1,2,3-ThiadiazolesJournal of the American Chemical Society, 1955