Processes for preparing S1P1 receptor modulators and crystal forms thereof

A salt selected from: L-lysine salt of (R) -2- (9-chloro-7- (4-isopropoxy-3- (trifluoromethyl) benzyloxy) -2,3-dihydro-1H-pyrrolo [1 acid, 2- a] indol-1-yl) acetic acid; Acid sodium salt (R) -2- (9-chloro-7- (4-isopropoxy-3- (trifluoromethyl) benzyloxy) -2,3-dihydro-1H-pyrrolo [1,2-a] indol- 1 -yl) acetic acid; Hydrate sodium salt of (R) -2- (9-chloro-7- (4-isopropoxy-3- (trifluoromethyl) benzyloxy) -2,3-dihydro-1H-pyrrolo [1,2-a] indol-1-yl) acetic acid; Salt hydrate of ethylenediamine (R) -2- (9-chloro-7- (4-isopropoxy-3- (trifluoromethyl) benzyloxy) -2,3-dihydro-1H-pyrrolo [1,2-a] indol-1- yl) acetic acid; Salt of 2-amino-2-hydroxymethyl-propane-1,3-diol (R) -2- (9-chloro-7- (4-isopropoxy-3- (trifluoromethyl) benzyloxy) - 2,3-dihydro -1H-pyrrolo [1,2-a] indol-1-yl) acetic acid; L-arginine salt of (R) -2- (9-chloro-7- (4-isopropoxy-3- (trifluoromethyl) benzyloxy) -2,3-dihydro-1H-pyrrolo [1,2- a] indole -1-yl) acetic acid; Zinc salt of (R) -2- (9-chloro-7- (4-isopropoxy-3- (trifluoromethyl) benzyloxy) -2,3-dihydro-1H-pyrrolo [1,2-a] indol-1 - yl) acetic acid; Acid calcium salt of (R) -2- (9-chloro-7- (isopropoxy-3- (trifluoromethyl) benzyloxy) -2,3-dihydro-1H-pyrrolo [1,2-a] indol-1-yl )acetic; N-methylglucamine salt of (R) -2- (9-chloro-7- (4-isopropoxy-3- (trifluoromethyl) benzyloxy) -2,3-dihydro-1H-pyrrolo [1,2-a] indol-1 -yl) acetic acid; Acid potassium salt (R) -2- (9-chloro-7- (4-isopropoxy-3- (trifluoromethyl) benzyloxy) -2,3-dihydro-1H-pyrrolo [1,2- a] indol-1 -yl) acetic acid; and magnesium salt of (R) -2- (9-chloro-7- (4-isopropoxy-3- (trifluoromethyl) benzyloxy) -2,3-dihydro-1H-pyrrolo [1,2- a] indole 1-yl) acetic acid.