TCI B6666, 3-Bromo-3-buten-1-ol (CAS 76334-36-6), is a compact bifunctional building block combining a primary alcohol with a vinyl bromide on a four-carbon chain. The vinyl bromide serves as a dependable partner in palladium-catalyzed cross-coupling, while the hydroxyl group can be protected, oxidized, or converted into a leaving group for subsequent steps. This orthogonal pairing makes it useful in total synthesis, ring-forming strategies, and medicinal chemistry analog work. AMI Scientific offers this TCI building block in 200 mg and 1 g pack sizes suited to small-scale and exploratory synthesis.
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