4-Nitro-5,6,7,8-tetrahydronaphth-1-yl isothiocyanate → 2-(4-Nitro-5,6,7,8-tetrahydro-1-naphthylimino)-3-thia-1-azaspiro[4.4]nonane

Participants

Reaction Steps

1-Amino-5,6,7,8-tetrahydronaphthaline was converted to 1-acetamino-5,6,7,8-tetrahydronaphthaline according to Method A2a, Step 1. The acetanilide was converted to 1-acetamino-4-nitro-5,6,7,8-tetrahydronaphthaline according according to Method A2a, Step 2. The acetanilide was deprotected according to Method A2a, Step 3 to give 1-amino-4-nitro-5,6,7,8-tetrahydronaphthaline. The aniline was converted to 4-nitro-5,6,7,8-tetrahydro-1-naphthyl isothiocyanate according to Method A2a, Step 3. 1-Amino-1-(hydroxymethyl)cyclopentane was synthesized as described in Method B1c. The 2-hydroxyethylamine was reacted with SOCl2 according to Method B7a to give 1-amino-1-(chloromethyl)cyclopentane HCl salt. The 2-chloroethylamine was reacted with 4-nitro-5,6,7,8-tetrahydro-1-naphthyl isothiocyanate according to Method C1a to give 2-(4-nitro-5,6,7,8-tetrahydro-1-naphthylimino)-3-thia-1-azaspiro[4.4]nonane. The thiazolidine was reacted with isobutyl bromide according to Method D2a to afford 1-isobutyl-2-(4-nitro-5,6,7,8-tetrahydro-1-naphthylimino)-3-thia-1-azaspiro[4.4]nonane.

Provenance & Evidence