Reference

Adamantanes showing good optical properties, solvent solubility, and heat resistance

Several substances are used for example 4942-47-6 and 19835-38-2 which are their cas registry numbers. Adamantanes showing good optical properties, solvent solubility, and heat resistance. Yamamoto, Hiromasa; Tanaka, Kenji (Tokuyama Corp., Japan). Jpn. Kokai Tokkyo Koho JP 2005015356 A2 20 Jan 2005, 12 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C07C069-608. APPLICATION: JP 2003-179777 24 Jun 2003. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 74 The adamantanes, useful as additives for far-UV photoresists, are I [R1 = (C1-6 alkyl-, C1-6 alkoxy-, or halo-substituted) C1-12 hydrocarbyl or C3-12 cyclic hydrocarbyl; R2 = H, C1-6 alkyl, (CH2)pCO2R4; R4 = same as R1; R3 = OH, halo, C1-6 alkyl; m, o = 0-3; n = 1-3]. Thus, 1-adamantaneacetyl chloride was treated with 2-ethyl-2-adamantyloxylithium to give 70% 2-ethyl-2-adamantyl 1-adamantaneacetate. .