tert-Butyl (1-(hydroxymethyl)cyclopropyl)carbamate

Solid

Tert-Butyl (1-(hydroxymethyl)cyclopropyl)carbamate could be converted into spirocyclopropanated analogues 14-CP and 14-CT of the insecticide Thiacloprid [1]. It can also be transformed into spirocyclopropanated analogs of Imidacloprid. This compound could be used to synthesize spirocyclopropanated five-membered ring analog 4-(3,5-Dichlorophenyl)-N-isopropyl-5-oxo-4,6-diazaspiro- [2.4]heptane-6-carboxamide[2].

Tert-Butyl (1-(hydroxymethyl)cyclopropyl)carbamate can be synthesized in three steps (40 % overall yield) from N, Ndibenzyl-2-benzyloxyacetamide starting with its reductive cyclopropanation (the de Meijere variant of the so-called Kulinkovich reaction). It can also be prepared in 56 % overall yield by monohydrolysis of commercially available diethyl cyclopropane-1,1-dicarboxylate followed by Curtius degradation of the carboxylic acid residue and subsequent reduction of the ester moiety[1].

[1] Brackmann F, et al. Synthesis of Spirocyclopropanated Analogues of Imidacloprid and Thiacloprid. European Journal of Organic Chemistry, 2005; 2005: 600-609.
[2] Brackmann F, et al. Synthesis of Spirocyclopropanated Analogues of Iprodione. European Journal of Organic Chemistry, 2005; 2005: 2250-2258.