132203-10-2

Upstream product

• 103621-13-2 (+/-)-(3aα,4α,6aα)-4-Chlorotetrahydro-1,3-bis(phenylmethyl)-1H-thieno<3,4-d>imidazol-2(3H)-one 
• 21210-43-5 (S)-Methyl mandelate 
• 186581-53-3 diazomethane 
• 132203-11-3 (S)-α-<<3aS-(3aα,4α,6aα)>-2-Hexahydro-2-oxo-1,3-bis(phenylmethyl)-1H-thieno<3,4-d>imidazol-4-yloxy>benzeneacetic acid 

Downstream Products

• 28092-52-6 (3aS,6aR)-1,3-dibenzyltetrahydro-1H-thieno[3,4-d]imidazole-2,4-dione 
• 103621-13-2 (+)-(3aα,4α,6aα)-4-Chlorotetrahydro-1,3-bis(phenylmethyl)-1H-thieno<3,4-d>imidazol-2(3H)-one 
• 132203-12-4 (+)-<3aS-(3α,4α,6aα)>-1,3-dibenzyl-3a,4,6,6a-tetrahydro-4-hydroxy-1H-thieno<3,4-d>imidazol-2(3H)-one 

Relevant academic research and scientific papers

Synthesis of (+)-biotin: Efficient resolution of key intermediates

Enantiomerically pure 4-chlorothieno[3,4-d]imidazol-2-one (+)-2 and thieno[3,4-d]imidazol-2,4-dione (+)-5, key intermediates in independent routes to (+)-biotin (6), have been prepared by resolution via the corresponding diastereomeric ethers (3d-g and 3'd-g). Efficient procedures to recycle the undesired diastereomers and recover the chiral auxiliary have been developed.