\documentclass[10pt,multi=False,border=5pt,tikz,class=scrartcl]{standalone}
\usepackage{xcolor}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\usetikzlibrary{arrows.meta}
\usetikzlibrary{decorations.pathmorphing}
\usepackage{upgreek}
 \usepackage{chemfig,chemmacros}
 \chemsetup{ modules = all }
\renewcommand*{\familydefault}{\sfdefault}
 \renewcommand*\printatom[1]{\ensuremath{\mathsf{#1} } }
 \setatomsep{2.25em}
 \setdoublesep{.6ex}
 \setarrowdefault{,1.5,semithick}
 \setbondstyle{thick,cap=round}
\setarrowlabelsep{1em}

\begin{document}
 \definesubmol\nobond{-[,0.25,,,draw=none]}
 \schemestart
   \subscheme{
     \chemfig{-[,,,,blue]*6(-[,,,,blue]=[,,,,blue]-[,,,,blue]
     	(-Pd(-[-2]P|Ph_3)(-X)-[2,,,2]Ph_2|P-[:30]([:30,,,,red]*6(=-=-=-)))
     =[,,,,blue]-[,,,,blue]=[,,,,blue])}
     \arrow{<=>[50\textdegree C]}[,1]
     \chemfig{
     	[:-30]*6(-[,,,,red]=[,,,,red]-[,,,,red]
		(-Pd(-[-2]P|Ph_3)(-X)-[2,,,2]Ph_2|P-[:30]([:30,,,,blue]*6(=-=(-)-=-)))
	=[,,,,red]-[,,,,red]=[,,,,red])
     }
   }
 \schemestop
\end{document}