Anodische dehydrierende Cyaniminierung von Thioethern: eine einfache und nachhaltige Synthese von N ‐Cyansulfiliminen

Anodic Dehydrogenative Cyanamidation of Thioethers: Simple and Sustainable Synthesis of N‐Cyanosulfilimines

Abstract A novel and very simple to perform electrochemical approach for the synthesis of several N‐cyanosulfilimines in good to excellent yields was established. This method provides access to biologically relevant sulfoximines by consecutive oxidation using electro‐generated periodate. This route can be easily scaled‐up to gram quantities. The S,N coupling is carried out at an inexpensive carbon anode by direct oxidation of sulfide. Therefore, the designed process is atom economic and represents a new “green route” for the synthesis of sulfilimines and sulfoximines.

Sustainable and cost-efficient electro-synthesis of formamidine acetate from cyanamide in aqueous acidic electrolyte

Formamidine represents a versatile building block in synthetic organic chemistry. We developed a new electrochemical synthesis of formamidine acetate by cathodic reduction of cyanamide in an aqueous electrolyte and in high yield. The crude product could be used for further conversions, such as to pyrimidines without purification. Compared to established synthetic routes neither prior processing of cyanamide was necessary, nor precious transition-metal catalyst were required, nor any reagent waste was produced, and only biocompatible and sustainable solvents were employed for this process, following the requirements of green chemistry.

Balance of payments crises and fiscal adjustment measures

A model with optimizing firms and consumers is used to explore the effects of unannounced and preannounced fiscal adjustment policies that are intended to prevent an impending balance of payments crisis. It is shown that preannouncement unambiguously raises the required fiscal adjustment effort so that, from the government's point of view, “cold turkey” is the preferable policy. The effect of preannouncement on the private sector's adjustment cost is ambiguous since preannouncement induces an externality which may either benefit or harm the private sector, depending on the nature of the measure that is preannounced.