Ammonium Chloride → 5-Chlorothiophene-2-carboximidamide hydrochloride

An 18-mL vial was charged with 5-chlorothiophene-2-carbonitrile (1 g, 7 mmol, 1 eq.), methanol (5 ml), Sodium methoxide (25 w % in methanol, 151 mg, 0.7 mmol, 0.1 eq.) was added. The mixture was stirred at rt for 3 hr. and then ammonium chloride (470 mg, 8.8 mmol, 1.25 eq.) was added. The resulting mixture was stirred at rt for 48 hr. The volatile material was removed under reduced pressure and the residue was treated with ether. The solid was collected by filtration and washed with ether, dried. The crude product (1.42 g) thus obtained contains inorganic salt and was forwarded to the next step without any further purification.

1. additionwas added
2. stirringThe resulting mixture was stirred at rt for 48 hr
3. customThe volatile material was removed under reduced pressure
4. additionthe residue was treated with ether
5. filtrationThe solid was collected by filtration
6. washwashed with ether
7. customdried

ORD record

ord-e0003272a44a456c8a8c104efd435c85

Source dataset

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09221843B2