ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
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ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
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Propargylamine is an important moiety in diverse biologically active natural materials, and can be utilized as a key intermediate for the synthesis of several bioactive compounds.[1] Propargylamine derivatives have also been used as starting materials for the synthesis of heterocycles such as pyrroles,[2] quinolones,[3] phenanthrolines,[4] pyrrolidines,[5] indolizines,[6] and oxazolidinones.[7] Three important methodologies have been introduced for the preparation of propargylamines: 1) Nucleophilic addition of metal acetylides to enamines and imines,[8] 2) amination of propargylic electrophiles (such as halides, propargylic phosphates and propargylic triflates)[9] and 3) three-component coupling reaction via C–H activation (Mannich condensation). Due to furnish complex molecules from simple commercially available starting materials, three-component condensation of terminal alkynes, amines and aldehydes is certainly the most popular and efficient method among the synthetic methodologies. Additionally, this type of reaction is performed in an atom economical approach and environmentally friendly pathway through a catalytic process. Various catalytic systems such as copper,[10] gold,[11] indium[12] and iron[13] based catalysts, have been introduced in this methodology. Some of these methods suffer from various limitations, such as application of toxic solvents and expensive non-reusable catalyst.