Push-pull ethanes

Theoretical calculations by Mixon and Cioslowski (1991) suggested that a push-pull substituted ethane (H2N)3C—C(N02)3 exists as an ion pair (H2N)3C C(N02)3. Recently, a similar hexamethylguanidinium-... 

A commercial synthesis of 2-bromothiophene was reported in the year 2014 (14PAT-2).The synthesis consists of oxidative bromination of thiophene with hydrogen bromide and hydrogen peroxide in dichloro-ethane at 40 °C. The method is amenable for large-scale production. Additionally, sequential one-pot syntheses of tri- and tetra-substituted thiophene and fluorescent push-pull thiophene acrylates involving (het)aryl dithioesters as thiocarbonyl precursors were reported (14MI-001). 

FIGURE 1-7 Push/Pull Processes for Ethan Allen Supply Chain for Customized Furniture... 

All processes in the customer order and manufacturing cycle at Ethan Allen are classified as pull processes because they are initiated by customer order arrival. The company, however, does not place component orders in response to a customer order. Inventory is replenished in anticipation of customer demand. All processes in the procurement cycle for Ethan Allen are thus classified as push processes, because they are in response to a forecast. 

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