On Sylow 2-subgroups of Shunkov groups saturated with the groups $L_3(2^m)$

A group $G$ is saturated with groups from a set of groups $X$ if any finite subgroup of $G$ is contained in a subgroup of $G$ isomorphic to some group from $X$. If all finite-order elements of a group $G$ are contained in a periodic subgroup of $G$, then this subgroup is called the periodic part of $G$. A group $G$ is called a Shunkov group if, for any finite subgroup $H$ of $G$, any two conjugate elements of prime order in the quotient group $N_G(H)/h$ generate a finite group. A Shunkov group may have no periodic part. We establish the structure of a Sylow 2-subgroup of a Shunkov group saturated with projective special linear groups of degree 3 over finite fields of even characteristic in the case when the Shunkov group has no periodic part.