Nelson R. answered 11/12/19
Effective Ph.D. Chemistry and Computer Tutor
The first step is determining the structure of the molecule that you are want to synthesize. One then works backwards to available starting materials. In my grad lab, we used the Aldrich catalog as a source of starting molecules.. I have looked up (+)-halomon, it is a complicated chiral molecule. It requires selective chiral addition of halogens. Personally, I would not start from 2-butene. I would look for a starting material with the chiral Chlorine already in place, if possible. I have found a sysnthesis. It is too complicated to provide in detail here. I will point you to the article by Bucher, et al published in J Am Chem. Soc. 2015 Oct 14: 137(40) 12784-12787 in your library or online