Multiple 1,2,3‐thiadiazoles

Abstract

A series of compounds 3a‐d,i‐n with two or three 1,2,3‐thiadiazole rings, useful for photocrosslinking processes, was prepared from the di‐ or triketones 1a‐d,i‐n via the corresponding hydrazones 2a‐d,i‐n by applying the Hurd‐Mori method. A special synthetic sequence, 1e, 2e, 3e, 3f/3g, was elaborated for the olefinic system 3h.

Bis(1,2,3‐thiadiazole)s as Precursors in the Synthesis of Bis(alkynethiolate)gold(I) Derivatives

“…The thiadiazoles 1-3 have been already reported by Meier et al, [63] their preparation involving the Hurd and Mori method with slight differences in the experimental workup. This method includes the cyclisation of α-methylene diketones in a two-step reaction.…”

Synthesis of new bis‐3,5‐diphenylpyrazolines derivatives linked with alkyl chains

“…The bis-chalcones derivatives 3a-f were obtained according to Claisen-Schmidt reaction by treating diketone 1 and aromatic aldehydes 2 in ethanol with catalytic amounts of sodium hydroxide [8]. All bischalcones were obtained in good yields.…”

“…The elemental analyses have been obtained using a LECO CHNS-900 and an Thermo Finnigan FlashEA1112 CHNS-O (STIUJA) elemental analyzers. Diketones 1 were obtained according to methodology described in work [8].…”

New many fold 1,2,3‐selenadiazole aromatic derivatives

“…al [1][2], however heterocyclic systems containing two 1,2,3-selenadiazole rings were also recently prepared through reacting the corresponding multiple diazoketones with Lawesson reagent by Reddy et. al [3][4].…”

“…Heterocyclic systems with multi-arm 1,2,3-thiadiazoles were recently prepared from the corresponding multi-arm ketones using the Hurd and Mori method by Meier et. al [1][2], however heterocyclic systems containing two 1,2,3-selenadiazole rings were also recently prepared through reacting the corresponding multiple diazoketones with Lawesson reagent by Reddy et. al [3][4].…”