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Synthesis and reactivity of 1,1-disodio-2,3,4,5-tetraphenyl-1-silacyclopentadiene

✍ Scribed by Wan-Chul Joo; Jang-Hwan Hong; Seok-Bong Choi; Hae-Eun Son; Chang Hwan Kim


Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
602 KB
Volume
391
Category
Article
ISSN
0022-328X

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Synthesis and reactivity of 1,2,4-triazo
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## Abstract The preparation of 1,2,4‐triazolo[1,5‐__c__]quinazolines 4a‐d, 5, 8a‐d by cyclocondensation of 1a‐c with carboxylic acids and carboxylic anhydrides, respectively, is described. By different pathways, the 5‐thioxo‐5,6‐dihydro‐1,2,4‐triazolo[1,5‐__c__]quinazolines 4a‐d react with hydrazin