1. Cyclopropane carbonyl chloride is an important intermediate.

2. The dissociative adsorption of cyclopropane on the copper surface was studied using density functional theory.

3. Cyclopropane rings are included within larger systems, such as triterpenes.

4. This paper reports the synthetic method for 1-bromo-1-ethoxy cyclopropane and the best synthetic conditions for hectogram production in the laboratory.

5. Under the optimum condition the yield of isopropyl cyclopropane carboxylate is 92 %.

6. So, the cyclopropane product comes from nickel carbenoids and chromium carbene.

7. This paper reviews the recent progress in the synthesis of cyclopropane amino acids.