It can be prepared in two similar ways: 1) The cyclization of 1-benzylglycerol (I) with iodoacetaldehyde (II) by means of sulfosalicylic acid at 100 C gives 2-iodomethyl-4-benzyloxymethyl-1,3-dioxolane (III), which is debenzylated by hydrogenation with H2 over Pd/C in methanol (1). 2) The cyclization of 1-benzylglycerol (I) with bromoacetaldehyde (IV) with sulfosalicylic acid at 100 C yields 2-bromomethyl-4-benzyloxymethyl-1,3-dioxolane (V), which is debenzylated by hydrogenation with H2 over Pd/C in methanol affording 2-bromomethyl-4-hydroxymethyl-1,3-dioxolane (VI) (1). Finally this compound is treated at 130 C in a pressure vessel (1,2).

It can be prepared in two similar ways: 1) The cyclization of 1-benzylglycerol (I) with iodoacetaldehyde (II) by means of sulfosalicylic acid at 100 C gives 2-iodomethyl-4-benzyloxymethyl-1,3-dioxolane (III), which is debenzylated by hydrogenation with H2 over Pd/C in methanol (1). 2) The cyclization of 1-benzylglycerol (I) with bromoacetaldehyde (IV) with sulfosalicylic acid at 100 C yields 2-bromomethyl-4-benzyloxymethyl-1,3-dioxolane (V), which is debenzylated by hydrogenation with H2 over Pd/C in methanol affording 2-bromomethyl-4-hydroxymethyl-1,3-dioxolane (VI) (1). Finally this compound is treated at 130 C in a pressure vessel (1,2).

It can be prepared in two similar ways: 1) The cyclization of 1-benzylglycerol (I) with iodoacetaldehyde (II) by means of sulfosalicylic acid at 100 C gives 2-iodomethyl-4-benzyloxymethyl-1,3-dioxolane (III), which is debenzylated by hydrogenation with H2 over Pd/C in methanol (1). 2) The cyclization of 1-benzylglycerol (I) with bromoacetaldehyde (IV) with sulfosalicylic acid at 100 C yields 2-bromomethyl-4-benzyloxymethyl-1,3-dioxolane (V), which is debenzylated by hydrogenation with H2 over Pd/C in methanol affording 2-bromomethyl-4-hydroxymethyl-1,3-dioxolane (VI) (1). Finally this compound is treated at 130 C in a pressure vessel (1,2).