| Title of Process/ Know-how/ Product/Design/Equipment
Preparation of industrially important organo-bromo compounds using brominating reagent
IPR Status & Details:
US 6,838,582 (2005); US 6,365,786 (2002); US 6,956,142 (2005); Eur. 2,365,960 (2011).
Application/Uses/Problem being addressed
CSMCRI/CSIR has developed a green brominating reagent (BR-S), an alternate to liquid bromine this reagent could be used for the preparation of various bromo-products such as 4-nitrobenzyl bromide PNBR (used as a protecting group in the synthesis of Penicillin and peptides), tetrabromobisphenol-A TBBP-A (widely used as a fire retardant), tri-bromoaniline TBA (dye intermediate), N-bromosuccinimide NBS (selective bromination source), bromobenzene (intermediate in the synthesis of various pharmaceuticals & fine chemicals) and bromoxynil (selective contact herbicide).
The use of BR-S, depends upon the number of bromide (Br) atoms to be substituted for a substrate, that many equivalents should be used. (Ex. For PNBR, TBBP-A, TBA, the BR-S required will be 1, 4, 3 equivalents respectively).
Salient Technical Features including Competing Features/ Impact
Replacement of the corrosive elemental bromine
Safe, easy to handle & transport
Avoids the need of special equipment
Avoids need of catalyst
Maximum bromide atom efficiency
Operates under ambient reaction conditions
Easy to scale-up for the processes’ development
No formation of hazardous byproducts
TRL Level & Scale of Development:- TRL 6 TRL Reference
Business scope & opportunity (in terms of scale, cost, market etc.)
Bromo-compounds manufacturers, ready at batch scale demonstration
Environmental Considerations
The process does not generate hazardous by-products. The effluent could be discharged after neutralization.
Status of Licensing:
Licensed technology
Status of Commercialization:
Not yet commercialized
Major Raw Materials Needed
Desired organic substrate, brominating reagent, mineral acid
Major Plant Equipment and Machinery Required
Glass reactor of desired size/batch with refluxing and cooling facilities
Techno-Economics
The cost varies based on the compound synthesized. The cost of the product would be roughly 1.2 – 2.6 times that of raw material cost.
Technology Package
Preparation of non-hazardous brominating reagent and its applications in the synthesis of organo-bromo derivatives
