The invention encompasses processes for the synthesis of –3–5-methylhexanoic acid, -Pregabalin, and intermediates of -Pregabalin. By using the shield plate to shield the MMIC, interference caused by external electromagnetic waves or leakage of electromagnetic waves to the exterior can be reduced in a chip alone. A protective system for protecting buildings, bridges, roads and other areas from explosive devices such as car bombs and the like comprises a plurality of the above described protective structures and a plurality of support members, wherein the support members provide interlocking engagement of the protective structures to the support members.