JCB (company) JCB (company) J.C. Bamford Excavators Limited, universally known as JCB, is an English multinational corporation, with headquarters in Rocester, Staffordshire, manufacturing equipment for construction, agriculture, waste handling and demolition. It produces over 300 types of machines, including diggers (backhoes), excavators, tractors and diesel engines. It has 22 factories across Asia, Europe, North America and South America; its products are sold in over 150 countries. JCB was founded in 1945 by Joseph Cyril Bamford, after whom it is named; it continues to be owned by the Bamford family. In the UK, India and Ireland, the word "JCB" is often used colloquially
Bamford–Stevens reaction Bamford–Stevens reaction The Bamford–Stevens reaction is a chemical reaction whereby treatment of tosylhydrazones with strong base gives alkenes. It is named for the British chemist William Randall Bamford and the Scottish chemist Thomas Stevens Stevens (1900–2000). The usage of aprotic solvents gives predominantly Z-alkenes, while protic solvent gives a mixture of E- and Z-alkenes. As an alkene-generating transformation, the Bamford–Stevens reaction has broad utility in synthetic methodology and complex molecule synthesis. The treatment of tosylhydrazones with alkyl lithium reagents is called the Shapiro reaction. The first step of the Bamford–Stevens reaction is the formation of the diazo compound 3. In