Safety of 1,4-Diethynyl-2,5-dimethoxybenzeneOn May 3, 2019 ,《Synthesis of Alkynyl Sulfides by Copper-Catalyzed Thiolation of Terminal Alkynes Using Thiosulfonates》 appeared in Organic Letters. The author of the article were Kanemoto, Kazuya; Yoshida, Suguru; Hosoya, Takamitsu. The article conveys some information:
A mild and odorless copper-catalyzed thiolation of terminal alkynes with thiosulfonates is described. The broad substrate scope provides convenient access to a wide variety of sulfur-containing heterocycles. In particular, divergent benzoheteroles are efficiently prepared in a simple manner by thiolation of ethynylbenzenes bearing ortho-nucleophilic functional groups followed by iodocyclization. In the experiment, the researchers used many compounds, for example, 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Safety of 1,4-Diethynyl-2,5-dimethoxybenzene)
1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers. Ethers lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Safety of 1,4-Diethynyl-2,5-dimethoxybenzene
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem