Remote stereo control

In 1993, a first application of the Walters protocol in natural product syntheses was reported [54] AT-allylamide 262 could be converted into a 1 1 mixture of the diastereomer nitriles 263 with 56% yield. Despite the mild reaction conditions, no external 1,2-asymmetric induction (remote stereo control) was operative when conducting such a rearrangement. The diastereomers were sep-... 

In lute 1941 Australian government researchers announced the development of a remote-controlled vehicle that can scout ahead of a rescue crew to locale missing and injured miners. Three stereo-video cameras permit the vehicle to operate in murky areas of a mine. The vehicle also includes gas analysis instrumentation. A fiber-optic cable, wound on a large drum, permits surface operators to convey instructions to the vehicle and to receive the results of gas analysis data and images of what the vehicle "sees. The vehicle is named after a burrowing marsupial, Numbat. 

The presence of hydroxyl groups, both adjacent and remote from the epoxide group, have been found to control the regio- and stereo-specificity of the tetracyanoethylene-catalysed methanolysis of cyclohexane epoxides.44 Because the nucleophilic attack occurs at the carbon remote from the hydroxyl group with inversion of configuration, it was suggested the hydroxyl group participates in the reaction. 

The non-oxidative photocyclization of the N-arylenamine (33) to the hexahydrocarbazole (34) has been investigated using flash photolysisThe related aryl vinyl ether photocyclization has been employed in the synthesis of the benzodihydrofuran (35) from the ether (36) and provides remote control of the stereo-... 

Control plug for Stereo phonograph cartridge Airline passenger service unit Television remote control switch assembly... 

Alkaline batteries (Fig. 19.12) are the power source in television remote controls, many toys, and personal stereos. These are often classified by their electrical potential and shape and size, such as the round AA or AAA 1.5-volt batteries or the rectangular 9-volt batteries. The anode of an alkaline battery is a gel that contains zinc in contact with a potassium hydroxide solution. The presence of the hydroxide ion is what gives these batteries their name. The cathode is a mixture of manganese(IV) oxide and graphite. The reactions are... 

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